6 Best Boat Wax for Fiberglass Boats in 2023

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If you’re looking for the best boat wax out there, then you’ve come to the right place. We’ve reviewed six different boat waxes from some of the most trusted brands in the industry.

The best boat wax for fiberglass boats will protect your vessel from the sun’s UV rays, water spots, and oxidation. It will also make it easier to clean and maintain your boat to last for many years to come.

Read this article to see the best waxes for boats. Enjoy!

Our Top Picks

6 Best Boat Wax for Fiberglass Boats

1. CSI Marine Wax Quart 62-M204-Q

Best Marine Polish for Carnauba Wax Protection

Key Features

  • Water-based formula
  • With Nano-emulsified technology for safety
  • Easy to apply spray wax
  • Provides wax protection

CSI Marine Wax is a long-lasting wax made with a water-based, environmentally friendly formula. It is designed with nano-emulsified technology making it effective and a unique fiberglass boat wax.

This product is easy to apply with its spray bottle and provides maximum Brazilian carnauba wax protection. 

Furthermore, this wax can be applied even under direct sunlight and does not leave any white residues. It is great to use for most types of surfaces, including fiberglass.

2. 3M Scotchgard Marine Liquid Wax

Best Marine Wax for Boats and RVs

Key Features

  • 3M marine ultra performance 
  • Great for gel coats, topside paints, and fiberglass
  • Easy to apply liquid wax
  • Utilizes reactive chemistry to protect the surface against weathering
  • Can restore the deep shine of your boats

3M Scotchgard Marine Liquid Wax is ideal for any surface finish, including gel coat, fiberglass, and topside paints. It uses reactive chemistry to maintain the durability and gloss of your boats.

Additionally, it is an easy-to-apply liquid wax that protects your boat surfaces from fading and degrading. 

3. Heavy-Duty Paste Fleetway

Best Marine Ultra Performance Paste

Key Features

  • Comes in thick wax for winter paint protection
  • Saltwater protection for boats and road salt protection for vehicles
  • Protects boat’s hull from oxidation
  • Great for single-stage automotive surface finish and fiberglass with gel coats

Heavy-Duty Paste Fleetwax is a thick paste formula that protects all vehicles from a harsh environment. This car wax has no cleaning properties, so it is usually the last step in cleaning and polishing your boats.

The thick paste is long-lasting without leaving any sticky residue. It can also protect your boat’s surface and hull from white and heavy oxidation.

4. Marine 31 Non-Skid Clear Sealant with Carnauba

Best Non-Skid Boat Wax

Key Features

  • Non-skid wax that protects fiberglass surfaces
  • A protective barrier that can fill in the pits and pores of non-skid gel coat surfaces 
  • Protects boat surface from the harsh effects of sun, rain, and saltwater

Marine 31 Non-Skid Clear Sealant is a fast-applying boat wax that protects your boat surfaces from rain saltwater. It is non-skid that ensures durable UV protection on fiberglass and gel coats.

This wax acts as an invisible protective layer that fills in micropores and pits for maximum protection.

5. Meguiar’s M6332 Flagship Premium Marine Wax

Best Boat Cleaner for Polymer Protection and Deep Gloss

Key Features

  • Easy to use wax either with hand pads or polisher
  • Specially formulated to provide polymer protection and deep gloss even to painted surfaces
  • Can protect boats from UV damage and wear
  • Restores shine on dull surfaces

Meguiar’s M6332 Flagship Premium Marine Wax is an easy-to-use wax that enriches the color and shine of your boats. You can use your hand pads or polisher when applying this product.

It offers long-lasting protection while restoring the high gloss shine of fiberglass and gel-coat surfaces. 

This premium wax protects your boat from the sun, especially when exposed to the sun for too long. One clear coat of this product can also help remove small scratches and white oxidation on your boat surfaces. 

6. OrPine Wash & Wax

Best Biodegradable Boat Soap 

Key Features

  • Biodegradable boat soap
  • Great for wood and metal surfaces
  • It can also remove bad odors
  • Salt spray

OrPine Wash and Wax is a biodegradable boat soap with wax protecting metal, wood, fiberglass, and gel coat. It can also help in removing musty odors and works well even in saltwater. 

best boat wax for fiberglass boats
Source: Canva Pro

Things to Consider When Buying a Boat Wax

Boat Wax or Boat Polish?

The main difference lies in the material a product is made of. A boat wax has a wax base which is typically carnauba, while a boat polish is made of different chemicals and polymer technology. 

Boat wax is best used on new boats with light oxidation; it can be applied by hands or boat buffers. Anglers can also use boat polishes on new boats.

You can also use it on old ones, but the oxidation must be cleaned and removed first. Boat polish can be applied by hand or an electric polishing machine.

Boat Type 

You should also know the type of boat you own before deciding what to buy. Not all waxes are compatible with all boat materials.

The typical components of boats are gel coats and fiberglass, so you should be aware of the products that are compatible with these materials.

Not all waxes are also saltwater compatible, so you also have to look into that. 

Protection Levels

Wax products are designed to protect your boats; you should know what protection levels they offer.

You should know whether your chosen boat wax can protect your vessel from UV damage, remove light oxidation, scratches, and stains.

A good wax should be able to protect your boat from all of these damaging factors.

Ease of Application

It would be best if you chose marine waxes that are easy to apply, especially during emergencies. You must know how to apply the boat wax to provide your boat the protection that it needs.

The easy application also saves you the hassle and effort of cleaning your boat for long hours.


It is always best to choose high-quality wax for your vessels. A good wax should be long-lasting and provide durable protection without damaging your boat surfaces.

It should not only give your boat finish shine and high gloss but also protect it from UV rays, scratches, stains, and oxidations.

Frequently Asked Questions 

Should you wax a fiberglass boat?

Yes, you can. Many boat owners wax their boats to protect them from harsh environments while at the same time restoring the shine, gloss, and color of your boats. 

What wax is best for fiberglass?

The best wax for fiberglass is Meguiar’s M6332 Premium Wax. It gives the best shine and color and provides them with the best protection they need against the sun, rain, and saltwater.

What is the longest-lasting boat wax?

Heavy Paste Wax Fleetway is the wax of choice when you need a wax that can give your boat maximum protection for a long time. It can protect your boats from harmful saltwater as well as your road vehicles from road salt.

What is the best wax to wax a boat?

The right boat wax depends on your boat type and your preferred application. It will depend on what you prefer.

With this, you should always remember to research properly before finally deciding on what wax to purchase. 

Protect Your Boats 

Your boats deserve the best protection there is. Different boat waxes depend on different descriptions and key features.

After reading the best boat wax reviews like this one, find the best boat wax suitable for your vessel and buy one! We hope this article helps!

Jon Stenstrom
Founder & Angler
Jon Stenstrom is a fishing enthusiast. He has over 25 years of fishing experience, and 6 years of spearfishing experience, and is currently learning how to boat. Jon has his Open Water PADI Certification and FII Freediver Level 1 Certification. Jon has traveled the world to fish and dive, most notably in the Great Barrier Reef, Baja Mexico, Thailand, and Malaysia. More Articles
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