Butyl Deck Flashing Tape

When applied to deck joists, 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.

Available Sizes: in 3" x 75' and 12" x 25' rolls.
  • 12-inch DECK FLASH BARRIER is a multipurpose tool for many niche decking and fencing jobs. When installed behind the ledger board, it self-seals around screws, bolts, and fasteners, preventing moisture infiltration in the structure adjacent to the deck. Installing DECK FLASH BARRIER over the ledger board creates a physical barrier, preventing wood rot caused by the accumulation of water against the lumber.
  • When installed around the base of a post, DECK FLASH BARRIER will prevent wood rot and decay, dramatically extending the life of your lumber.
  • When DECK FLASH BARRIER is placed between treated lumber and metal surfaces it creates a physical barrier that prevents the corrosion of metal caused by contact with the chemicals in treated lumber.