303 Rubber seal protectant conditions rubber seals on doors, windows, and trunks. Designed to rejuvenate colors of old seals and restore elasticity. The 303 Rubber Seal formula protects against drying and cracking in extreme temperatures. Seal protectant is great for use on cars, trucks, RVs, boats, and more. Easy to use applicator bottle. Protects against drying and cracking For use on vehicles, RVs, boats, and more | 303 Rubber Seal Protectant, 3.4 oz