SKWOL™ Boat Stain Remover eliminates tough stains, algae, and waterline discoloration on fiberglass, gelcoat, and marine surfaces.

Before and after using SKWOL™ Boat Stain Remover to clean waterline stains, algae buildup, and grime from a boat hull.

SKWOL™ Boat Stain Remover being applied to a boat hull, breaking down tough stains for a spotless, restored finish.

Formula 4

Name: Formula 4
Brand: Spot Cleaner
SKU: SKW009
Price: 23.00 USD
Availability: InStock

A pH-neutral, marine-grade cleaner that removes stains, black streaks, fish blood, dirt and grime without stripping wax or coatings. Free from harsh chemicals, dyes, and PFAS, it's EPA Safer Choice-compliant and safe for all surfaces, including carpets and fabrics—delivering powerful, residue-free cleaning.

• Safe for carpets
• Non-yellowing solution
• Won’t strip wax, polish or ceramic

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Formula 4

$23.00

People are asking

Is it safe for all surfaces?

Yes, it's pH Neutral and free of degreasers and dyes. It is safe for all trim levels including luxury vinyls, wraps, metals and more. It will not dry, fade, discolor nor expose materials. It will not strip wax, polish, ceramic or other protective coatings. 

What does it smell like?

A subtle and sophisticated fragrance we refer to as "Coastal Palms." It's light, pleasant aromatics complement the experience often associated with marine environments. Not fruity, nor sweet. Minimalist and naturally inspired, its fragrance is equally inviting as it is universally appreciated.

Is it eco-friendly?

Ingredients in this soap are listed on the United States Environmental Protection Agency's (EPA) Safer Choice Chemicals List. It does not bioaccumulate and is fully biodegradable. There are no hazardous chemicals according to the U.S. Clean Air Act and U.S. Clean Water Act. Safe for aquatic life.

• Phosphate-Free
• Dye-Free
• Bleach-Free
• PFAS-Free
• Biodegradable
• Non-Corrosive

What tools do I need?

We recommend clean edgeless microfiber cloths and soft bristle automotive detailing brushes

Where is it made?

All of our formulas are proudly made in the United States of America. We are a family owned and operated business. All of our production and efficacy trials take place in South Florida, U.S.A.