EASY TO USE: Simply spray the product directly onto the surface and allow to sit for 1 to 3 minutes. Agitate the surface with a brush or terry cloth towel, then thoroughly rinse and dry the surface. MULTIPLE USES: Safe for Boats, Home, Bathroom & Shower, Vinyl, Tile, Grout, Patio, Coolers, and just about anywhere else that may accumulate stains. Marine 31 Mildew Stain Remover works like no other! SAFE: Erase unwanted stains without risk of discoloring, dulling or drying out vinyl seats. Even the most severe stains are no match for the cleaning power of Marine 31 Mildew Stain Remover. FAST WORKING: Marine 31 Mildew Stain Remover quickly erases stains from surfaces including vinyl, fiberglass, gel coat, canopies & more without the need of abrasive power washing and/or scrubbing.