303 Touchless Sealant The 303 Touchless Sealant is designed to be an effective alternative to waxing your vehicle. Designed to be effective in both salt and freshwater environments. The Si02 has been modified to be more like a liquefied glass with a hydrophobic component to aid in water repellency and durability. This formula is both biodegradable and marine safe. 303 Touchless Sealant is designed to be effective on gel coat, fiberglass, metal, plastic, and clear vinyl surfaces as well as windsh