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 Can I build my final membrane all at once? What Products to use to waterproof a Floating Sauna Floor? How should I prepare the surface? Comments 0 comments Please sign in to leave a comment.