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 does it seal? What is Liquid Rubber Seam Tape used for? I hope to build a concrete reflection pool 60 feet long, 4 feet wide, 4" deep build the base first; then the walls. Can I use Liquid Rubber to render the pond reliably waterproof? What is Liquid Rubber MetalSafe Sealant used for? Carport Flat Roof Comments 0 comments Please sign in to leave a comment.