This is not your average crawl space seam tape. This 4” 7-mil thick seam tape comes in 180’ (60 yd) long rolls.
Viper CS 16+ LIFETIME, Nash Distribution, Crawlspace Vapor Barrier
Crawl Space Ninja - DIY Store
Seam tape is used to create a waterproof seal along liner seams. Tape roll measures 4 wide by 180' in length.
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ROBERTS Seam Guard 1-7/8 in. x 100 ft. x 0.005 in. Underlayment Tape Roll 50-040 - The Home Depot
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Tapes - Crawl Space Ninja - DIY Store