Alvin Products' Rubber In A Can penetrates into cracks and holes to create a leak-proof seal for repairing RVs, trucks, boats and more. This flexible black rubberized liquid spray paint can be sprayed anywhere a watertight, leak-proof seal is required, stays flexible, and will not crack, chip or peel. Suitable for use on virtually any rigid surface, this flexible rubber coating flows into openings and is paintable. The product withstands temperatures from -20 degrees F to 300 degrees F and can be applied to wet and dry surfaces.