This tape is used to seal the seams of the crawl space vapor barrier. It comes in 4" x 187' rolls (compare to rolls at only 108') and is white to match all of the vapor barriers we offer. This product, when installed correctly, will give you a waterproof seal at the seams. In very wet conditions it is recommended to use the Foundation Seal Tape™ under the seam to give an extra layer of protection. This tape is the perfect thickness for this application allowing proper flexibility without sacrificing strength. "Cheaper" tapes are known to release when they come in contact with moisture leaving your crawl space exposed. Just because other tapes are white does not make them the same. This product is Field Tested and the only tape we warranty on our installs. If you save $5 on a roll of tape and it fails, did you save $5? Sold individually, or buy in bulk. Save on orders of 12 or more rolls! This tape comes in one roll that is 4" wide and 187' long. How much tape do you need? Here is the guide we go by- 1 roll of StickE® Seam Tape for every 500 Sq Ft of floor space rounded up. For example; 400 Sq Ft you need 1 roll, 700 Sq Ft you will need 2 rolls, 1600 Sq Ft you will need 4 rolls etc. In addition you will need one roll for every 6- 8x8 or 8x16 support. Case includes 12 rolls- Save 15% on orders of 12 or more rolls. Overall Customer Rating of 131 Reviews: Write a review! Read all reviews John Rzadkowolski Mi. StickE® Seam Tape Tape 1/1/2022 Durability: Quality: Recommend: Pros: Sticks to everything Cons: Sticks to everything Great tape!! SHJoe StickE® Seam Tape Worth the price 9/23/2021 Durability: Quality: Recommend: Pros: Cons: The installers in my crawl space used a tape that is 2 3/4" wide. Given 2000 sq. ft. over time there were 3 areas that needed repair. The 4" tape is excellent for this task or even a new install. Tape is tight to pull (a good thing) an adheres very well. Overall a great value. Shipping costs are a bite but not a deal breaker. Li