S-1 is a two-part Clear Penetrating Epoxy Sealer. Mixed at a simple 1:1 ratio S-1 is extremely effective at prolonging the service life of all woods, metals and fiberglass reinforced polyester. S-1 is ready to use with no thinning required. It displays excellent wetting properties on most surfaces. S-1 has a long pot life and can be applied with a brush, roller or spray equipment. It is completely waterproof and suitable for use above or below the waterline. S-1 is a superb undercoat primer for most paints and clear finishes featuring strong adhesion to most substrates with minimal surface preparation. S-1 does not require sanding between coats if recoat time is less than 24 hours. It is resistant to salt air, mild acids, alkalis, chemicals and solvents. S-1 is not recommended for gas tanks containing unleaded gasoline. Simple 1:1 mix ratio Ready-to-use viscosity, no thinning required Excellent wetting properties on most surfaces Applies by brush, roller, or spray Long pot life Waterproof Strong adhesion to most substrates with minimal surface preparation Remains flexible in cold temperatures No sanding required between coats up to 24 hours Resistant to salt air and water, and mild acids, alkalis, chemicals and solvents (Not unleaded gasoline-proof).