Tesa Tape - Joist Protection Tape

Tesa JoistSeal is a waterproof tape that sticks to deck joists to block moisture and stop rot. Apply it before laying boards to keep the sub-structure strong and extend the life of your deck.

Why choose Tesa JoistSeal?

• Joist waterproofing made easy - PET/PE woven fabric forms a tough moisture barrier that helps prevent rot, splitting and corrosion in timber or steel joists

• Linerless, self-wound roll - No paper backing means faster, cleaner installs and virtually zero job-site waste. Apply up to 2× quicker than conventional liner-based joist protection tapes.

• High-performance acrylic adhesive - Engineered for long-term adhesion in hot summers and wet winters. Bonds firmly to hardwood, treated pine, composite or metal joists.

• Tear by hand convenience - Waterproof backing rips cleanly for rapid trimming around fixings while resisting fraying, splitting and punctures.

• Weatherproof durability - Creates a UV-stable, weather resistant seal that deflects rain and stops water infiltration, extending deck lifespan and reducing maintenance costs.

Typical Applications

• New timber or composite decking installations

• Joist and bearer protection during deck restorations

• Moisture barrier under rooftop and balcony deck frames

• Steel joist corrosion prevention