Spray 9 Fiberglass & General Purpose Cleaners

Spray 9: Heavy-Duty Cleaning for Fiberglass and Every Surface That Demands It

When grime, grease, and stubborn stains settle into fiberglass surfaces — boat hulls, RV panels, personal watercraft, and marine gear — you need a cleaner that does more than wipe the surface clean. Spray 9 has spent over 60 years earning the trust of manufacturers, professional technicians, and serious DIYers with a formula engineered to tackle the toughest cleaning challenges head-on.

Spray 9's flagship products in the Fiberglass & General Purpose Cleaners category center on their signature “Triple Threat” approach: a single formula that cleans, degreasers, and disinfects simultaneously. That multi-function capability is what sets Spray 9 apart from single-purpose cleaners on a crowded shelf.

What Makes Spray 9 Stand Out on Fiberglass

Fiberglass is one of the most demanding surfaces to clean — it's porous enough to trap oxidation, waterline stains, and biological residue, yet sensitive enough to be damaged by harsh solvents. Spray 9's water-based formula addresses both concerns directly. It is a unique water-based blend that serves as a safer alternative to solvent-based degreasers, and it contains no petroleum or chlorinated solvents. It is also VOC compliant in all 50 states, making it a responsible choice for both marine and shop environments.

For fiberglass hulls and marine surfaces, the Marine Spray Nine variant is purpose-built to perform above and below deck. Rated the #1 vinyl cleaner by Powerboat Reports and a top-rated general cleaner by Practical Sailor, it removes stains and yellowing, eliminates bacterial odors, and works on hulls, boat covers, jet skis, galleys, awnings, coolers, inflatables, and life jackets — essentially anything you'd find on or around the water.

The Nine Functions in One Product

The “Nine” in Spray 9 isn't just a name — it reflects the product's documented range of uses. In the context of fiberglass and general cleaning, those nine functions are especially valuable:

• Cleans tough grease, carbon soils, dirt, mud, and road grime
• Degreasers oils, brake dust, tar, and bug splatter from surfaces
• Disinfects against viruses in 30 seconds (EPA-registered, #6659-3)
• Disinfects against bacteria in 45 seconds
• Sanitizes hard, non-porous surfaces in just 10 seconds, killing 99.9% of bacteria
• Kills fungus in 3 minutes
• Deodorizes without masking odors
• Controls mold and mildew — a critical advantage on marine fiberglass
• Removes stains including yellowing, ink, scuff marks, and carpet stains

Importantly, Spray 9 achieves all of this without bleach or corrosive chemicals, making it safe for use on the wide variety of materials — vinyl, rubber, plastic, and painted surfaces — that typically accompany fiberglass in marine and automotive settings.

EPA-Registered and NSF Approved

For professionals who need documented performance, Spray 9's Heavy Duty Cleaner is both an EPA-registered disinfectant and NSF approved (C-1 rated) — credentials that matter in fleet maintenance, marine service environments, and facilities where sanitation standards are enforced. No-rinse required after application means less time cleaning and more time on the water or in the shop.

Whether you're restoring a weathered boat hull, degreasing a fiberglass engine bay panel, or doing a full detail on an RV exterior, Spray 9's general purpose cleaners deliver professional-grade results in a format that works for serious enthusiasts and working professionals alike.