10 Best Cleaner For Fiberglass Boat of December 2025

• New gel formula instantly removes grassy marine growth, rust, scum line, yellowing, fish blood and more
• New gel spray formula clings to the underside of boats and other vertical surfaces
• Safe for use on fiberglass & painted surfaces
• No hard rubbing or scrubbing required
• Made with pride in the USA

STAR BRITE

• Clinging spray on gel that increases surface penetration

Bio-Kleen

• ONE EASY STEP: Non-abrasive marine cleaner quickly cleans, polishes and protects all fiberglass gel coat marine or RV surfaces in one easy step
• REMOVE LIGHT DEFECTS: Safely and effectively removes light oxidation, haze, minor scratches and swirls
• RESTORE COLOR AND GLOSS: Non-abrasive cleaners and polishing oils easily restores color, brilliance and gloss to fiberglass gel coat surfaces
• SUPERIOR PROTECTION: Provides durable, long-lasting protection against salt air, corrosion and the sun's ultraviolet rays
• VERSATILE: Safe and ffective by hand, DA Polisher or Rotary Buffer. Also available in 16 oz. and 1 gallon sizes

MEGUIAR'S

• REMOVES TOUGH STAINS & SCUM INSTANTLY: Our instant hull cleaner effortlessly cuts through slimy grimy buildup on the hull and boat bottom to leave your boat sparkling clean and new. It removes stains from waterlines, algae, lime deposits, gas exhaust, grease, grime and hard water. Our hull cleaner is a highly effective fiberglass stain remover , fiberglass cleaner and can be used as an algae cleaner for boats, for marine fume removal, a waterline remover, black streak remover and rust remover.
• SAFE FOR FIBERGLASS & MORE: Our fiberglass hull cleaner is safe for an aluminum hull, gelcoat, metal and painted surfaces - unlike other fiberglass cleaners or boat wash. Our effective boat hull cleaner quickly and effortlessly removes water spots, river water gunk, buildup from salt water and more. A fiberglass hull cleaner works to restore, discolored and yellowed boat surfaces to bright white. Our fiberglass hull cleaner and boat stain remover tackles the toughest, set-in stubborn stains!
• WORKS ON CONTACT: Our boat stain cleaner quickly and easily removes tough new and old stains and heavy build up from the hull and bottom of your boat. This versatile cleaner can be applied using a sponge or sprayer. Simply apply solution, allow to sit for 2 minutes and rinse. This boat hull cleaner for fiberglass and painted surfaces removes unsightly stains on contact! We stand behind the quality of our boat cleaning products and marine cleaning supplies!
• EXCEPTIONAL QUALITY - MADE IN THE USA: We proudly stand behind the quality of all our boat supplies and products! We are a family owned American business committed to making premium quality boat cleaning supplies.

Better Boat

• Gel"sticks" where it is sprayed, making it ideal for vertical surfaces
• Penetrates into the stain to lift and remove it without heavy scrubbing
• Safe for all fiberglass surfaces; does not contain dangerous, caustic acids
• Ideal for removing "yellowing" and scum lines on hulls
• Dissolves rust, fish blood, dried leaf spots and other tough stains

STAR BRITE

• One 16oz. bottle of Fiberglass Boat Cleaner and one 16oz. bottle of Fiberglass Boat Wax
• Cleaner restores neglected fiberglass finishes effected by weathering
• Preps surface for follow-up wax shine and protection
• Wax enhances look while protecting finish
• Provides excellent coating of durability

Collinite

• Removes deposits on boat bottoms, scum line and rust stains quickly and easily
• Loosens the toughest deposits on boat bottoms, removes scum lines and rust stains
• Water based, environmentally friendly formula
• Special patented buffering process makes this product safer than other acid based bottom cleaners

STAR BRITE

• Restores neglected fiberglass finishes effected by weathering
• Preps surface for follow-up wax shine and protection
• Improves wax bond,spread and staying power
• Pack of 2

Collinite

• Formulated to begin working on contact to lift and remove unsightly grime, yellowing and waterline stains
• Very effective at removing rust stains or leaf stains from fiberglass or painted surfaces
• Will not harm the surface being cleaned and is an ideal preparation for polishing the hull
• Star brite products are proudly made in the United States since 1973

STAR BRITE

• Cleans, shines and protects in one step
• Quick and easy to use
• Specially formulated for fiberglass, metals and painted surfaces
• UV inhibitors help prevent fading and oxidation

STAR BRITE