Do I have to coat Liquid Rubber Seam Tape? Yes, the paintable seam tape will begin to break down from UV over time. Related articles How should I prepare the surface before applying Waterproof Sealant? How does it seal? What is Liquid Rubber Seam Tape used for? Will sun have an effect on the Liquid Rubber Textured Sealant? Can I use RV Roof Coating on a Metal Trailer Roof? Comments 0 comments Please sign in to leave a comment.