Marine 31 Non-Skid Clear Sealant with Carnauba Marine 31 Non-Skid Clear Sealant with Carnauba is a specially formulated non-skid boat wax that is designed to provide durable protection on fiberglass and gel coat non-skid surfaces. Formulated to fill in the microscopic pits and pores of non-skid gel coat surfaces, this high-tech non-skid boat wax forms a durable barrier of protection that protects the surface against the damaging effects of sun, rain, salt water, and more 20 oz. Made in USA