WATERPROOF JOIST PROTECTION: The 6-inch wide butyl tape seals the top of deck joists against rain and snow melt, stopping water from seeping into the end grain where rot starts. Apply before you lay the deck boards to extend the life of your framing.
HEAVY-DUTY BUTYL TAPE: Thick, flexible rubber backing conforms to uneven wood surfaces and bonds on contact. The aggressive adhesive stays put in summer heat and winter freeze, without drying out or cracking over time, year after year.
SELF-ADHESIVE, EASY TO APPLY: Peel and roll directly over joist tops, beam faces, and ledger boards. No mixing, no fasteners, no waiting. The 50-foot roll lets you cover multiple joists in a single pass, trimming around posts with a utility knife.
OUTDOOR WEATHER RESISTANCE: This waterproof tape works on deck framing, shed foundations, garden beds, pergola beams, and roof flashing details. The black, UV-resistant film stands up to direct sun, rain, and temperature swings, holding its seal season after season.
SINGLE ROLL SPECIFICATION: Each package contains one roll of black butyl joist tape, 6 inches wide by 50 feet long. The wider 6-inch profile covers larger glulam and triple-2x joist tops in a single strip. Measure your joist count and spacing before ordering.