Deck Joist Tape, 6 in x 50 ft Waterproof Butyl Flashing Tape | UV-resistant butyl sealant protects wood joists, beams, RV roofs and outdoor decks from water, moisture and weather damage.

Features

• EXTREME TEMPERATURE RESISTANCE: Unlike standard deck tapes that fail at 230F, our butyl sealant tape performs flawlessly from -40F to 360F. It wont crack in freezing winters or melt in scorching summers. This weatherproof flashing tape delivers reliable sealing for deck joists, beams, and RV roofs in any climate from Alaskan cold to Arizona heat. Perfect for outdoor wood construction and high-temperature roof applications.
• WATERPROOF & UV-RESISTANT: Made from premium butyl rubber with a thickened adhesive layer, this deck joist tape creates a watertight barrier that stops moisture from damaging wood. The UV-resistant rubber layer prevents curling and cracking under direct sunlight a critical feature for outdoor decks, composite decking, and exposed beams. Never worry about wood decay or moisture-related joist failure again.
• SUPERIOR ADHESION: Our industrial-grade butyl adhesive bonds instantly to pressure-treated wood, metal joists, PVC, and rubber flashing. The PVC backing allows easy peeling and positioning. For best results, install at 50F (10C) or above; in cold weather, warm the tape with a hair dryer before use adhesion strengthens fully after 12 hours, creating a permanent, shock-absorbing seal that wont loosen over time. Ideal for RV repair, deck flashing, and beam wrapping.
• EASY INSTALLATION: Designed for DIY deck builders and professional contractors, this self-adhesive butyl tape conforms to flat joists, curved beams, and uneven wood surfaces. No caulk gun, no curing time simply clean the surface, peel the protective film, press firmly, and youre done. We offer three size options: 2 inches, 4 inches, and 6 inches to match your project needs. The wide width reduces overlaps and speeds up deck maintenance.
• VERSATILE APPLICATIONS: Use it as joist flashing tape for new deck construction, RV roof patch tape for leaks, gutter seal tape for downspouts, or nail hole repair tape for shingles. Also ideal for window flashing, HVAC duct sealing, pipe moisture protection, and mobile home roof repair. Whether you're building a cedar deck, repairing a boat house, or winterizing an outdoor structure, this all-weather butyl tape delivers professional-grade protection against water, moisture, and UV damage.