Sudbury Fiberglass Stain Lifter - Pint (16oz)

The Sudbury Fiberglass Stain Lifter – Pint (16oz) is a non-abrasive gel formulation designed specifically for boat owners and marine enthusiasts who need to restore fiberglass surfaces without risk of damage. After years on the water, hulls accumulate waterline stains, rust marks, exhaust discoloration, and algae growth that standard cleaning methods cannot remove. This product chemically lifts those stubborn stains rather than scrubbing them away, making it especially valuable for newer vessels where finish protection is critical.

The gel's chemistry works by penetrating and breaking down mineral deposits, organic growth, and oxidation without abrading the underlying gelcoat or fiberglass matrix. Unlike pumice-based or microabrasive cleaners that can dull or scratch delicate marine finishes, this stain lifter uses a gentler lifting mechanism that preserves the high-gloss appearance boaters expect. The pint size (16 ounces) provides sufficient volume for typical maintenance applications, allowing you to treat multiple stained areas or make repeated passes on heavily discolored sections without multiple purchases.

Fiberglass boat owners—particularly those with topsides that endure saltwater exposure or extended dock time—benefit most from this product's targeted formula. Apply it to waterline stains, transom discoloration from engine exhaust, and areas where algae or mineral buildup has accumulated. The non-abrasive gel works on all fiberglass surfaces common to recreational and fishing vessels, making it an essential maintenance item for preserving resale value and aesthetic condition. Simply apply, allow dwell time, and rinse thoroughly for professional-grade results without the labor or equipment demands of buffing or sanding.