Foundation Seal Tape™ — CSR

Foundation Seal Tape™ — Seal for the Crawl Space Vapor Barrier

For a strong, moisture seal between your crawl space vapor barrier and the foundation wall, Foundation Seal Tape™ (FST) is the professional’s choice. This heavy-duty, reinforced black tape provides a reliable moisture seal between the crawl space vapor barrier and the concrete foundation wall when paired with Foundation Pins™.

• Reinforced for Stability – Unlike other look alike tapes that stretch and fail in crawl space conditions, FST is reinforced to maintain its shape and ensure easy installation.
• Strong Seal – Adheres to clean, dry concrete foundation walls, holding the vapor barrier securely for several hours or days until permanent fasteners are installed.
• Perfect for Crawl Spaces – At 1.5" wide x 100' long, most crawl spaces will need 2 rolls to complete the job.
• Not for Wet Foundation Walls – For damp or wet foundations, we recommend using a premium encapsulation caulk to create a strong, lasting seal in place of the FST.
• Professional Installation Tips – Avoid dust buildup by limiting wire brushing, as debris can reduce adhesion. Store indoors during cold months to maintain optimal performance.

Pro Tip: When calculating your Foundation Seal Tape™ needs, don’t forget to measure under beam pockets, ductwork and the crawl space access door for full coverage.