Best Fiberglass RV Waxes Come Rain, Wind or Shine

Best Fiberglass RV Waxes Come Rain, Wind or Shine

Every passionate RVer takes a sense of pride in the appearance of their rig. And one of the easiest ways to make your RV literally shine is applying a fresh new coat of glossy fiberglass-friendly wax.

Neglect to wax your rig regularly, and her exterior will start to look dull and lifeless. But if you take the time to doll out a little TLC each season, you‘ll be turning heads every time you pull into the RV park.

Not sure where to start? The waxing process is surprisingly simple and doesn’t require any specialist skills. In this guide, we’re going to teach you everything you need to know about fiberglass RV wax and present the top 10 options on the market today.

Factors to Consider in Fiberglass RV Wax

Before we start rattling off our list of the best fiberglass RV waxes, you need to wrap your head around the key things to consider. Keep the following ten things in mind when browsing our recommendations.

For more detailed information on some factor, click the hyperlinks to skip ahead to the relevant part of our in-depth buyer’s guide.

Base Ingredient

RV fiberglass waxes are based on one of three key ingredients: natural oils (usually carnauba), petroleum distillates, or polymers and resins. Each has its distinct pros and cons and may only be suitable for certain kinds of RV finishes, so we recommend reading up on each ingredient before choosing a product.

Consistency Type

RV fiberglass waxes also come in one of three consistency types: rub on liquids, pastes, and spray-on liquids. Again, each has its unique advantages and disadvantages, so we recommend studying the details in our section on consistency types.

Suitability

The distinct exterior finish on your RV will affect which wax product is best for you, so take the time to read about the most common types of RV finish. If you don’t know already, work out what finish you’ve got on your rig and ensure your wax of choice is compatible. Wherever possible, we provide this information in our Quick Facts section to make life easier for you.

Application

Fiberglass RV wax comes as an ordinary standalone wax or a combo, usually either a restore-and-wax or a wash-and-wax combination. The latter negates the need to scrub your rig thoroughly before applying wax—all you need to do is hose down the exterior surface, and you’re good to go. Although less convenient and more expensive, standalone wax often yields better results.

Versatility

If you’d like a product you can use on other things aside from fiberglass, then look for a versatile, multipurpose wax that’s suitable for many different surfaces. For example, some products work well on both fiberglass and painted surfaces with a topcoat, allowing you to wax multiple items with the same product.

Container Size

The last thing you want is to get halfway through waxing your RV and run out of juice—and you don’t want to blow your budget by purchasing three times more than you need, either. First things first, work out roughly how much wax you need and look for the appropriate-sized container.

Weather Protection

Aside from making your RV look all shiny and new, a high-quality fiberglass wax will add a robust layer of weather protection as well. Consequently, your pride and joy will be better equipped to withstand the snow, rain, and sun.

Durability

Some waxes must be reapplied regularly, while others tend to last for a year or more. If you’re not someone who enjoys working with your hands, then opt for a long-lasting coat. That way, once the job is done, you won’t have to worry about it for a long time.

Abrasiveness

Sometimes known as roughness, abrasiveness refers to how likely the wax is to leave little scratches or haziness on your fiberglass finish. By design, RV waxes tend to be non-abrasive to protect the aesthetics of your rig. Nonetheless, it’s always worth double-checking the label first.

Oxidation Removal

If you’ve got oxidation issues in your RV, then consider getting a product with oxidation removal properties. These have been specially formulated to help treat corrosion while still bestowing your exterior with a nice glossy shine.

With this in mind, we’ve reviewed a wide variety of fiberglass RV waxes so you can find the one most appropriate for you. Let’s get your ride looking glorious.

Top 10 Best Fiberglass RV Waxes 2021

1. Best Overall Wax: Meguiar’s M5032 Liquid Cleaner Wax

Meguiar’s M5032 Liquid Cleaner Wax

Why we like it: This widely popular RV wax does a brilliant job for a reasonable price.

Editor’s Rating:

Quick Facts:

  • Base Ingredient: Petroleum distillates
  • Consistency: Rub-on liquid
  • Suitability: Fiberglass
  • Application: Wash-wax-combo
  • Size: 32-ounce bottle (other sizes available)

Meguiar is one of the biggest names in the car detailing space, and its highly sought-after RV and marine care line is especially beloved by outdoor enthusiasts. And the M50 Liquid Cleaner Wax is its flagship product for its unmatched ability to protect and polish any kind of RV surface.

This non-abrasive formula is a wash-and-wax combo, meaning you won’t have to spend hours ensuring your rig is spotlessly clean. It also removes light oxidation, so you might be able to use it in place of a dedicated oxidation-removal regime.

Above all else, the M50 is a hit for its ability to remove light defects like haze, swirls, and annoying little scratches, thus making your RV look new. The glossy fresh coat will last quite a long time as well, so you won’t have to reapply it any time soon.

As the liquid product is non-toxic, it’s safe to apply by hand or with help from a DA polisher or rotary buffer.

We’ve listed the 32-ounce container here as it would suit most RVs. If you’ve got a massive rig and plan on applying multiple coats over the years, you’ll save a chunk of change (and hassle) with the one-gallon option. If you need less, it comes in 16 ounces, too.

Pros

  • Trusted brand sold in various sizes
  • Convenient wash-and-wax combo
  • Removes light oxidation and scratching
  • Long-lasting formula with good weather protection
  • Safe to apply by hand or machine

Cons

  • Only suitable for fiberglass

2. Best Premium Wax: Meguiar’s M6332 Flagship Premium Marine Wax

Meguiar’s M6332 Flagship Premium Marine Wax

Why we like it: Few fiberglass waxes on the market leave your RV looking as shiny and new as this.

Editor’s Rating:

Quick Facts:

  • Base Ingredient: Petroleum distillates and polymer
  • Consistency: Rub-on liquid
  • Suitability: Fiberglass and Gel coat
  • Application: Wax only
  • Size: 32-ounce bottle (other sizes available)

If you’re after the best of the best, then Meguiar’s premium RV wax is about as good as they get.

Aside from offering a long-lasting coat of tough weather-resistant wax, this product is renowned for its lovely glossy sheen. Scratches and swirls will be a thing of the past, and the color and shine of your fiberglass exterior will exceed expectations.

Meguiar market this premium wax as their flagship product, and it does indeed outsell the cheaper M50 version. Even though this one comes in at almost double the cost, the difference is only about $15-20, which is nothing compared to what you’ll pay for other RV products. And if you’re dead keen on achieving optimal gloss, that relatively minor extra investment is well worth it.

Aside from the added expense, the downside to this product when compared to the M50 is it’s a wax-only affair. Essentially, that means you’ll have to thoroughly wash your RV first, ideally with a separate product, to achieve the optimal effect—and that means more elbow grease and expense.

On the bright side, it’s okay to use a dual-action variable speed polisher, which means it won’t take you too long to get the job done.

Looking for a different size? It’s available in one gallon and 16-ounce bottles as well.

Pros

  • Superb glossy sheen
  • Reduces scratches and swirls
  • Long-lasting coat
  • Excellent weather resistance

Cons

  • Expensive
  • Requires pre-washing

3. Best Budget Wax: Aero Cosmetics Wash Wax All

Aero Cosmetics Wash Wax All

Why we like it: This bargain-basement wax-and-wash is practical, user-friendly, and cheap.

Editor’s Rating:

Quick Facts:

  • Base Ingredient: Natural plant-based formula
  • Consistency: Spray-on liquid
  • Suitability: All vehicle surfaces
  • Application: Wash-and-wax
  • Size: One-gallon tub + 16-ounce spray

If you’re planning on waxing your RV regularly to keep her looking sleek at all times, then this cost-effective product from Aero Cosmetics could be ideal.

The bulky one-gallon tub comes with a bonus 16-ounce spray bottle and four specially designed terry-toweling cloths—a generous package that represents outstanding value for money.

The plant-based formula is designed for use on all automotive surfaces, including sealants and ceramic coatings. It’s a waterless wash and wax, which means you apply it as your recently hosed-down vehicle is drying for best results.

The company claims the likes of NASA and Air Force One have been using this product for 33 years. And although we can’t vouch for that, we can confirm the product provides a high level of protection and a lovely glossy sheen, which is especially impressive when you consider how cheap it is.

It’s environmentally friendly, too; the biodegradable formula won’t damage fragile eco-systems or irritate the eyes.

One thing it won’t do, however, is cure oxidized, scratched, or dull surfaces. Of course, Aero Cosmetics sells something that will: the widely popular Polish ALL.

Pros

  • Affordable and effective product
  • Suitable for every automotive surface
  • Lovely glossy sheen
  • Environmentally friendly formula
  • High level of protection

Cons

  • Doesn’t help with oxidation or scratches

4. Best Oxidation Removal Kit: Meguiar M-4965 MG Fiberglass Kit

Meguiar M-4965 MG Fiberglass Kit

Why we like it: You’ll take care of those unsightly oxidation marks and gift your rig a fresh glossy sheen.

Editor’s Rating:

Quick Facts:

  • Base Ingredient: Carnauba
  • Consistency: Rub-on liquid
  • Suitability: Gel coat fiberglass
  • Application: Oxidation removal, wax, and polish
  • Size: Three 16-ounce bottles

Waxing your rig is only part of a proper care regime, especially if your ride is starting to look battered and worn from heavy use. Over the years, scuff marks, scratches, and oxidation spots will pop up on her chassis, creating an unattractive aesthetic that’s far from ideal.

But rather than taking your RV to a pricey panel beater to buff out its imperfections, the good news is you can treat minor damage yourself. Meguiar makes some of the best automotive care products on the market, and this three-in-one kit does an outstanding job at restoring your RV to its former glory.

The first step is to apply the specially designed scratch and oxidation remover, which works wonders at cleaning up minor stains. Once that’s dried, you’ll need to use the wax, a unique blend based on Brazilian carnauba that provides long-lasting protection and plenty of shine. Finally, to finish up, add a generous coat of high gloss polish to make your rig sparkle.

While it’s possible to purchase these three essential car care products separately, Meguiar offers a good discount when you get them as part of a package. So if you’ve got a few pesky little oxidation spots you’re planning to treat anyway, then this deal makes a lot of sense.

Be aware that the oxidation remover will only work on minor oxidation spots and stains—anything worse will require professional intervention. It also contains a few harsh chemicals that irritate the skin and eyes, so don’t forget to don adequate PPE.

Pros

  • Good value three-in-one pack
  • Oxidation removal works well on minor stains
  • Carnauba gives long-lasting protection
  • Polish offers a high level of gloss
  • Trusted brand

Cons

  • Not worth it if you don’t have oxidation issues
  • Oxidation remover component requires PPE

5. Best Sealant Hybrid: CarGuys Hybrid Wax Sealant

CarGuys Hybrid Wax Sealant

Why we like it: It seals your walls and roofs while adding a lovely glossy sheen at the same time.

Editor’s Rating:

Quick Facts:

  • Base Ingredient: Polymer
  • Consistency: Liquid spray on
  • Suitability: All automotive surfaces
  • Application: Wax and sealant
  • Size: 18-ounce bottle

If you feel you’re RV could use a bit of extra sealant in addition to a layer of wax, then this highly effective polymer product from CarGuys is your best bet.

The specially formulated synthetic product offers the protection of a long-lasting paint sealant and the buttery glow of a carnauba-style wax in one. The protection at play is superior to any ordinary, non-hybrid wax out there—you get an advanced anti-UV layer and a firm hydrophobic barrier.

And for the time-poor or lazy RVer, the good news is the application process is a breeze. All you have to do is hose down your rig, spray it on and then wipe it off again.

For a hybrid product, the end result is remarkable. After just a few minutes of work, you’ll get a streak-free and slick glossy surface ready to offer ample protection for the months to come.

Now, notice how we said months rather than years? You’ll need to reapply this one every three to six months, depending on the climatic conditions where you live. That’s substantially more often than many of our recommendations, but at least the application process is easy.

We also love the versatility here, as the fact it works on any automotive surface of any color means you can use it on your everyday vehicle as well. It even gets the job done for other surface types such as interior paint, rims, plastics, glass, and chrome—talk about multipurpose!

Pros

  • Seals and gives a glossy shine
  • Superior protection to regular wax
  • Can easily apply in 15 minutes
  • Works on multiple surfaces

Cons

  • Need to reapply every three to six months

6. Best Combo Pack: Collinite 920 Cleaner & 925 Wax Combo

Collinite 920 Cleaner & 925 Wax Combo

Why we like it: Although it’ll take longer to apply, this combo from Collinite delivers outstanding results.

Editor’s Rating:

Quick Facts:

  • Base Ingredient: Pure carnauba wax
  • Consistency: Rub-on liquid
  • Suitability: Fiberglass gel coat
  • Application: Separate wash and wax products
  • Size: 16-ounce bottle

Handcrafted right here in the USA since 1936, the Collinite 925 wax has been a favorite among sailors and Rivers for generations. And now, the company is offering its highly-sought-after wash and wax product together as part of an awesome value pack.

The 920 Wash comes in an easy-to-apply liquid consistency that works well at restoring a weather-worn fiberglass finish. Its mild-cut compound effectively removes chalkiness, discoloration, and light oxidation, bringing back that cherished like-new aesthetic to your rig (to an extent, anyway). Perhaps most importantly, however, is that it primes the surface of your RV to receive a fresh coat of wax.

The 925 Wax gives you a high level of protection and shine, with this all-natural 100% carnauba formula being among the most glistening wax on our list. And the fact this runny liquid doesn’t require a whole load of elbow grease means its application is a breeze—wax on and wipe off in circular motions, and that’s it. This product is easy enough to apply by hand and you don’t need to use machinery.

Although the final result is superb, this product still doesn’t perform quite as well as the Collinite Paste—you really can’t beat the stark shimmering effect of a thick carnauba paste. If you’re happy to put the effort in for a brilliantly glossy RV, consider investing in the Collinite paste or the Malco Imperial Paste Wax instead.

Pros

  • Value for money combo pack
  • Easy to apply liquid
  • Wash cleans and removes imperfections
  • Wax adds superior protection and shine

Cons

  • Requires two separate applications
  • Doesn’t shine as much as paste

7. Best Paste: Malco Imperial Paste Wax

Malco Imperial Paste Wax

Why we like it: This potent paste restores your RV’s shine and provides ample protection from the elements.

Editor’s Rating:

Quick Facts:

  • Base Ingredient: Carnauba
  • Consistency: Paste
  • Suitability: Fiberglass and painted surfaces
  • Application: Wax only
  • Size: 14-ounce tin

Although liquid waxes are the product of choice for most RVers, a paste is an excellent alternative if you’re ready to put in a bit of extra effort. While the thick and greasy consistency requires much more elbow grease to apply, it’s impossible to beat the radiating gleam that comes with a fresh new coat of paste.

Malco, an industry-leading car-care brand with some 150 products in circulation, makes the best fiberglass wax paste on the market. Aside from providing a high level of protection, this wonder paste emits a brilliant like-new glow that’ll make your rig look like it’s just rolled off the factory floor.

The abrasive-free product includes effective anti-swirl agents that make it especially useful on dark or bright colored rigs. And aside from your RV, there’s no reason you can’t use this on other automobiles. The product is good to go for anything with a fiberglass gel coat or painted topcoat finish, plus other miscellaneous items like furniture and appliances.

Malco’s paste even emits a pleasant watermelon aroma, a neat little bonus you won’t find on any other waxes out there.

The big drawback to this product—and it’s a biggie—is that paste-style waxes take ages to apply. If you can picture yourself lovingly buffing up your entire rig with a tiny little cloth for hours on end, then, by all means, buy this product today. But if you’d prefer to grab something quick and easy, we recommend Meguiar’s M50 instead.

Pros

  • Provides optimal like-new shine
  • Looks great on dark or colorful RVs
  • Works on all automobiles and various other surfaces
  • Trusted, well-known brand

Cons

  • Paste-style wax takes a long time to apply

8. Best Biodegradable: Thetford 32517 RV Wash and Wax

Thetford 32517 RV Wash and Wax

Why we like it: This fantastic product from Thetford is both convenient and environmentally friendly.

Editor’s Rating:

Quick Facts:

  • Base Ingredient: Carnauba wax
  • Consistency: Liquid spray-on
  • Suitability: All automotive surfaces
  • Application: Wash and wax
  • Size: One gallon

Thetford is a big name in the RV world—the large multinational company is famed for its toilets, appliances, accessories, and other RV products. And although its flagship RV wash-and-wax combo isn’t exactly a pillar of its success, it’s a high-performing product that gets the job done.

As a wash-and-wax combo, Thetford offers a convenient product that negates the need for scrubbing down an RV twice—and that’s a godsend when you’ve got a big rig. One single application is all you’ll need to not only get your RV squeaky clean, but to make her sparkle like new again too.

The detergent element of the liquid works wonders at washing away black streaks and other debris such as dirt, dead bugs, bird poop, and more. The magic of the wax component then kicks in to leave the surface of your RV with a lovely shiny finish. And the Brazilian carnauba wax compound isn’t just useful for sheen; it boasts exceptional water-repelling and UV protective properties as well.

Although convenience is the major draw card here, this product has another massive plus for the environmentally conscious among us: it’s bio-degradable. If you’re stressed about where your RV wax might wash up, Thetford gives you peace of mind you won’t be poisoning the planet.

Now, as much as we love the convenience of a wash and wax formula, it’s worth reminding you they simply don’t perform as well as separate liquids. If you want optimal cleanliness, protection, and shine, opt for separate wash and wax products or a combo deal like Collinite 920 / 925.

Pros

  • High-performing wash and wax
  • Convenient option means cleaning once only
  • Exceptional water-repelling and UV properties
  • Bio-degradable formula is good for the environment

Cons

  • Doesn’t perform as well as dedicated products

9. Best Wax / Restorer Combo: 3M Marine Cleaner & Wax

3M Marine Cleaner & Wax

Why we like it: It does a brilliant at removing light oxidation and restoring your RV’s natural shine.

Editor’s Rating:

Quick Facts:

  • Base Ingredient: Polymers
  • Consistency: Rub-on Liquid
  • Suitability: Fiberglass gel coats and painted topcoats
  • Application: Oxidation removal and wax
  • Size: 16-ounce bottle

Although 3M makes this powerful two-in-one product for boats, there’s no harm in using it on your RV—or any other automobile, for that matter. The unique selling point of this particular product is it serves as an oxidation removal agent and a wax in one.

Unlike Meguiar’s M-4965 kit, this is one single product, so you only have to apply it once. Not only is the process more convenient, but it will save you a substantial amount of time as well, especially if you’ve got a lot of surface area to cover. For that reason alone, the 3M Marine Cleaner & Wax is a hit among boat detailers as they can treat more vessels in a day.

It’s worth noting that boats tend to suffer worse from oxidation than RVs—they’re constantly submerged in salty water, after all. If your RV isn’t showing visible signs of oxidation damage, then there’s no point investing in this product. The liquid formula is much more expensive than a regular wax, so you should first ensure it’s something you need.

The specially formulated compound treats light to medium oxidation at the source and restores your RV’s shine with one single application. And although it yields impressive results, it doesn’t perform as well as dedicated oxidation removers and waxes. The aforementioned Meguiar’s M-4965 kit, for example, will work better at eradicating oxidation and restoring shine—albeit with much more hands-on effort.

We’ve linked to the gallon tub in this review, which costs quite a lot and might be more than you need. Opt for the cheaper 16-ounce bottle if you only need a little bit.

Pros

  • Two-in-one oxidation remover and wax
  • Favorite among boat detailers for its convenience
  • Only one single application required
  • Yields impressive results

Cons

  • Isn’t as effective as dedicated products

10. Best Budget Eco-Friendly: TR Industries Gel-Gloss RV Cleaner and Wax

TR Industries Gel-Gloss RV Cleaner and Wax

Why we like it: This product proves saving the planet doesn’t have to cost an arm and a leg.

Editor’s Rating:

Quick Facts:

  • Base Ingredient: Carnauba wax
  • Consistency: Rub-on liquid
  • Suitability: All automotive surfaces
  • Application: Wash-and-wax
  • Size: 1-gallon bottle

The Gel-Gloss from TR Industries is all about convenience and unbridled eco cred. As a two-in-one wash-and-wax, you don’t need to stuff around cleaning and priming your rig—just “wax on and wax off,” as our friend Mr. Miyagi would say. You won’t have to scrub hard to get dirt and stains to disappear, making this a fast and convenient option.

Best of all, each coat is set to last for an entire 12 month period, so you won’t have to worry about applying a new one any time soon.

That saves you a whole bunch of time, but it does come at a cost: performance. This popular two-in-one product won’t make your RV shine like a dedicated carnauba wax, so give it a miss if you’re obsessed with aesthetics. Streaks and spots tend to occur on occasion, and the phenomenon is especially visible under direct sunlight. To rectify the issue, give the streaks a thorough buff with a microfiber cloth.

The environmentally-friendly product is 100% bio-degradable, so you needn’t spend time searching for a responsible place to apply it. And the fact it comes in a giant one-gallon container for a low price point makes it excellent value for money—perfect for the eco-warrior on a shoestring budget.

Even if you’ve got an enormous bus-style big rig or fifth wheel, you’re sure to have some leftover once you’re done. And that means there’s no need to purchase another product when it’s time to wax again next year.

Pros

  • Fast and convenient
  • Eco-friendly formula
  • Works well for 12 months

Cons

  • Not as effective as two dedicated products
  • Can leave streaks and sunspots

Fiberglass RV Wax Buyer’s Guide


Fiberglass RV with fresh wax by a lake

If you want to learn all there is to know about fiberglass RV wax, this is the section for you. In our in-depth buyer’s guide, we’re going to discuss its benefits and provide detailed information on things like the ingredients you’ll frequently come across and the different consistencies available.

The Benefits of Using Fiberglass RV Wax

Although fiberglass wax isn’t all that expensive, finding a suitable brand and applying it regularly is quite a lot of work. Even Mr. Miyagi found the chore rather tiresome—why do you think he got the Karate Kid to wax for him?

But is waxing worth the effort? We certainly think so, and we’ll give you three solid reasons as to why.

Make Your RV Shine

The primary reason for applying fiberglass wax is to make your RV shine. If you’re passionate about the aesthetics of your rig, then a beautiful fresh coat of glossy wax is essential. Add to that a proper good wash and polish, and you’ll be the envy of the entire RV park as you roll past looking all glam.

Protect the Exterior

But waxing isn’t all about looks. A fresh coat of high-quality wax will protect your RV’s fiberglass frame from the elements, letting it look nice and new after years of exposure to sun and rain. And having a like-new RV that’s free of exterior degradation will enhance its value, putting more cash in your hand when it’s time to sell.

Cleaning Is a Breeze

A slippery coat of fiberglass wax will do a superb job at repelling dirt and dust that would otherwise cling to your paintwork. That way, you won’t have to wash your RV so often, saving precious resources and valuable time. Many RVers opt to give their rigs a quick wax before a big trip to make the cleanup easier when they get home.

Fiberglass RV Wax Ingredients

All fiberglass wax products for RVs are based on three key ingredients, each of which features distinct pros and cons.

Carnauba

Carnauba is a common natural wax used on various types of automobiles, including fiberglass RVs. The ingredient comes from the Brazilian palm tree and is the most hardened natural wax in the world. Carnauba sometimes comes mixed with beeswax or natural oils.

Because carnauba evolved to protect palm trees from the fierce tropical sun, it’s highly durable and offers superb water resistance. Upon drying out, it’ll also leave your rig with a gorgeous glossy finish and add additional UV protection. As you might expect, the all-natural ingredient is more environmentally friendly than its synthetic counterparts

On the downside, you’ll need to reapply it regularly to maintain its glossy sheen and protective properties—aim for a recoat every one to three months. The ingredient is also less durable and resistant to grime than other types, especially in warmer climates due to its low melting point.

Pros:

  • Durable and weather-resistant
  • Lovely glossy shine
  • Environmentally friendly

Cons:

  • Must be applied regularly (1-3 months)
  • Less resistant to dirt, especially when hot

If you think carnauba-based product is right for you, this paste is a great choice.

Petroleum Distillates

Fiberglass waxes derived from petroleum distillates are an excellent option for budget-conscious buyers as they’re incredibly cheap. Because these waxes come from crude oil, they’re super easy to spread over the smooth fiberglass surface of your RV and are just as easy to wipe off again.

On the downside, these waxes do tend to leave behind a greasy residue, which isn’t the ideal texture for an RV. You’ll also need to give these a wide birth if your RV has a gel coat or topcoat finish on its fiberglass. Petroleum distillates can cause these to corrode and enhance the oxidization process.

Pros:

  • Highly cost-effective solution
  • Easy to spread on and wipe off

Cons:

  • May leave a greasy residue
  • Not suitable for gel coat or topcoat finish

If you’re looking for a petroleum option, this wax might be ideal, although it’s more expensive than most of this type.

Polymers and Resins

Polymers and resins are the most modern fiberglass wax on the market and have become increasingly popular in recent years. The plastic-like substance sticks to painted surfaces like a dream and offers a more long-lasting level of protection than natural waxes like carnauba.

Waxes with polymers and resins will harden as they dry. Once fully set, the wax will start to shine, although the sheen won’t be quite as brilliant as a petroleum distillate or natural wax.

Pros:

  • Works exceptionally well on painted surfaces
  • Provides long-lasting protection

Cons:

  • Doesn’t shine as brightly as others

If you want a polymer based wax, check out this sealant hybrid for starters.

The Different Consistencies of Fiberglass RV Wax

Fiberglass wax for RVs comes in three distinct consistency types: a rub-on liquid, a paste, and a spray-on liquid. The consistency type often depends on the primary ingredient, and each type has unique pros and cons.

Rub-on Liquid Wax

Rub-on liquid is the most common consistency of fiberglass wax. It’s usually wiped on with an applicator and wiped off with a towel, although it is possible to use machinery as well.

A significant advantage to liquid wax is it’s sold in several different sizes, which makes it easy to find a suitable option for your RV. If you’ve got a small RV and only tend to wax and wash once or twice a year, then you should be okay with a quart. But for frequent waxing on a big rig, you’ll probably want to get at a one-gallon tub.

Paste Wax

Paste is a common consistency for natural waxes like carnauba, and must be applied by hand. Consequently, paste takes much longer to apply, especially when you’re trying to cover a large surface area on a massive fifth wheel or RV. Nonetheless, it also yields superior shine, making it worth the effort for proud RV owners who insist on a slick-looking rig.

Paste tends to come in smaller packages than liquid, so be prepared to buy several at once if you’ve got a big waxing job ahead of you.

Liquid Spray-on Wax

Spray-on wax lets you spray the substance all over the fiberglass exterior of your RV. The process is quick and easy, especially once you master the art of spraying and wiping with one hand, then polishing with the other.

For some annoying reason we don’t quite understand, the spray bottles tend to be too small and run out halfway through, so we recommend grabbing a few. Spray-on liquid wax is typically more expensive than the rub-on variety, but its ease of application makes it worthwhile for many RVers.

A word of warning, though: try a little bit out first to see how it looks on your rig before waxing the whole thing—spray waxes sometimes have unpredictable results.

Fiberglass RV Wax Longevity

The more durable a fiberglass wax is, the less frequently you’ll need to apply it. And that means less time chanting “wax on, wax off” and more time cruising around America in your shiny RV.

Even the most durable, long-lasting waxes—typically polymers and resins—will only last about a year, so you’ll need to keep your maintenance regime up if you want a slick-looking rig.

Unfortunately, it’s difficult to ascertain how long a wax will last because many manufacturers prefer not to publish this information. Generally speaking, though, in terms of durability, polymers are the best, natural resins like carnauba are the worst, and petroleum distillates lie somewhere in between.

Fiberglass RV Wax Versatility

Just because your RV wax works wonders on your fiberglass rig doesn’t necessarily mean you can’t apply it on other surfaces as well.

Some waxes are highly versatile, meaning you could use them on things like gel coat, painted metal, and aluminum. That way, you can wax your car, boat, Jet Ski, or any other big boy toy at the same time as your RV.

Another consideration is the weather. While you can apply most fiberglass waxes in variable climatic conditions, natural waxes like carnauba don’t do well in the heat. Because carnauba has a low melting point, hot weather makes it go all gooey and attract excess dirt and grime. If in doubt, check the temperature specifications on the manufacturer label.

The Different Types of RV Finish

Not every RV wax will be suitable for your rig, and you could cause long-lasting damage should you accidentally apply the wrong type. With that in mind, it’s best to obtain a solid understanding of the different types of RV finishes.

Fiberglass is a durable plastic reinforced with tiny fibers of glass (hence the name) held together by resin. The highly sought-after material is commonly used on boats and RVs for its strength, durability, and flexibility—all ideal qualities for life on the road.

Fiberglass Gel Coat Finish

Fiberglass is commonly given a gel coat finish that offers additional protection from the sun and the rain. Usually, the finish will have a white or cream color, and manufacturers will often include a decal or two.

Fiberglass with a gel coat finish requires frequent waxing and cleaning; otherwise, it’ll start to look rough, chalky, or hazy over time. Opt for a product capable of cleaning and waxing at the same time.

Corrugated Fiberglass

Corrugated fiberglass is recognizable for its trademark rough or ribbed texture. The material is much cheaper than a smooth fiberglass/gel coat combo, although it’s also much harder to clean.

Corrugated fiberglass is commonly found on older and cheaper RVs.

Painted Fiberglass With a Topcoat Finish

Fully painted RV finishes are more expensive than other types, although they’re easy to clean, extra durable, and look fantastic after a proper good polish.

Most of the time, the manufacturer applies a base layer of paint and then puts a transparent topcoat over the top. The topcoat leaves the surface all smooth and shiny, making it simple to wax and wash.

High-end RVs almost always come with this finish as it outperforms other types, especially in terms of durability.

Bare/Coated Aluminum

Bare or coated aluminum RVs are primarily a thing of the past, although there are still a few old-school rigs roaming around these days. The Airstream brand, in particular, had an affinity for this finish, but their late-model units have since moved on.

If you’ve got a bare aluminum finish on your rig, you’ll need to polish it slowly with a gentle abrasive product. More modern aluminum rigs have a clear coat on top, on which you can use the same sort of wax you would with a topcoat on paint.

How to Wax a Fiberglass RV

Although the exact process varies depending on the finish of your RV and your preferred brand of wax, we’ll outline the basic steps for waxing a fiberglass rig below:

  1. Thoroughly scrub your RV clean using your preferred RV wash and a sponge
  2. Rinse off the soapy water with a hose
  3. Allow your RV to dry
  4. Apply the RV fiberglass wax to a wax pad
  5. Use the pad to wax the fiberglass exterior using circular motions
  6. Wait a few minutes for the wax to dry into a haze
  7. Remove the wax using a microfiber towel in a slow circular motion
  8. Buff the exterior using the microfiber towel in a fast circular motion

Pro tips:

  • Wax your rig undercover if you can. Rain will prevent the wax from adhering to the fiberglass exterior and ruin the entire process. Excessive heat, on the other hand, will cause the wax to dry too quickly and get caked on, making it tough to remove.
  • You can save time and energy by using a mechanical buffer. Rotary buffers spin in a circular motion at high speed, which can lead to unsightly swirl marks. Random orbital buffers are a better choice as they move the pad in a randomized pattern to prevent swirls.

FAQ

Fiberglass RV driving down the highway

Check out our extensive FAQ for further information on fiberglass RV wax.

Can You Use Car Wax on Fiberglass RV?

Many types of automotive wax are perfectly suited for RV use. However, you’ll need to check the product’s specifications to ensure it’s suitable for the exterior finish of your RV. Specially designed marine and RV waxes are generally better anyway as they are less abrasive and come in bigger containers. We have an article about the best car waxes that are more general purpose.

What Is the Best RV Wax?

The best RV wax depends on how much effort you want to put in. If you’re happy to take the time to wash and wax your RV separately, then the Meguiar’s M6332 is your best bet. On the other hand, if you’d rather save time by doing both simultaneously, the Meguiar’s M50 is hard to beat.

How Often Should You Wax Your RV?

To keep your prized RV in tip-top shape, you should aim to wax it regularly. The exact frequency depends on the specific kind of wax you’re planning to use—or, more importantly, the wax you used last time.

Natural carnauba waxes need to be reapplied every three months or so to retain their shine. Other types, such as polymers, only need doing once per year.

How Do You Restore Faded Fiberglass?

First, scrub the surface of your RV with warm soapy water to clean off all the dirt, then rinse your rig. Next, apply a fiberglass anti-oxidation product to a clean rag and rub it in circular motions over the oxidized areas until they become smooth. Finally, after allowing the previous product to dry, you can apply your preferred RV fiberglass wax.

Will Vinegar Remove Oxidation From Fiberglass?

Vinegar works well at removing oxidation from fiberglass, but the versatile solution is only really suitable for minor spots and stains. For more extensive oxidation issues, we recommend using one of the products mentioned on our list.

Best RV Fiberglass Waxes: Final Thoughts

Now that you’ve made it to the end of our in-depth buyer’s guide, you’ve learned just about everything there is to know about fiberglass waxes for RVs. All that’s left to do now is sift through our top 10 recommendations and pick out the product that best suits your needs.

Taking the time to give your RV some TLC with a thorough waxing will not only restore her brilliant natural gleam, it’ll also protect your rig from the elements.

RV fiberglass waxes aren’t all that expensive in the grand scheme of things. And the application process is surprisingly straightforward—so pretty soon your ride will be looking its best. If you’re looking for other ways to firm up your ride against the elements and keep it in good shape, check out our guide to best RV roof sealants and coatings.