Will sun have an effect on the Liquid Rubber Foundation Sealant? Yes, Liquid Rubber Foundation Sealant should not be exposed to UV over long periods of time. Use Liquid Rubber Waterproof Sealant for UV projects. Related articles Will sun have an effect on the Liquid Rubber Waterproof Sealant? How should I prepare the surface? Can this product be used to waterproof shower walls and base? Can it be tiled over? Comments 0 comments Please sign in to leave a comment.