Extend the life of your new deck, and protect your deck cost investment by applying Deck Flash Barrier to the tops of the deck joists before installing new deck boards. Deck Flash Barrier's tough, slip-resistant polyethylene facing material and new super grip adhesive creates a waterproof membrane. It self-seals around screws and nails, blocking the primary pathway of water infiltration into the joist lumber. Using Deck Flash Barrier eliminates the main cause of wood rot and the number one cause of future deck failure. Deck Flash Barrier can also be used to stop the potential for metal surface corrosion by creating a physical barrier between joist hangers and wood decking materials.