Cofair Butyl Deck Flash Barrier Decking Joist Tape

When applied to deck joists, BUTYL DECK FLASH BARRIER creates a waterproof membrane that prevents wood rot and decay caused by the accumulation of moisture under the decking boards. Deck Flash Barrier self-seals around screws and nails blocking the primary pathway of water into lumber. Also, when placed between treated lumber and metal, BUTYL DECK FLASH BARRIER eliminates the potential for the corrosion of the metal surface.