Foundation Seam Tape – Butyl Tape 2-inch Wide

(3 customer reviews)


In stock

Frequently Bought Together

Vapor Barrier Fastener-Purchase Hilti GX 3

Crawl Space Seam Tape

Insulation Vapor Barrier

SKU: CSN-EN-BT2IN-01 Categories: , ,


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  • 2″ Wide x 50′ Long 
  • Gray 2-sided
  • Made in U.S.A.
  • Qty – 1 Roll
  • Adheres best in 60°-78°F
  • Do not store in areas above 78°F – adhesive can melt
  • If product arrives hot, place in freezer for at least 30 min.

Butyl tape or foundation seam tape is a great tool for the crawl space repair DIY contractor. 2-sided butyl tape can assist you when putting up the vapor barrier on foundation walls and pillars.

TGM-3300 is a butyl-based material between two release liners capable of bonding a variety of items together. TGM-3300 offers an aggressive grip, stays flexible during application, assuring immediate adhesion on contact, and superior long-term bonding. Perfect for metal, plastics and some fabrics, TGM-3300’s pressure sensitive properties allow a fast, clean and easy application. Thickness: 32 Mils Tensile Strength: 445 PSI Avg Adhesive: THE GRAY MATTER™ Elastomeric Modified Butyl Rubber.

Q: How Much Butyl Tape Do I Need?

First you need to take a measurement to get the linear feet of your crawl space’s perimeter. For example, if you have a crawl space that is 50 feet long and 20 feet wide (1000 square feet) we simply add the measurements of each wall to get your total perimeter linear feet. 50 feet + 20 feet + 50 feet + 20 feet = 140 total linear feet. That’s how much butyl tape you’ll need. Since each roll is 50 feet, you would need 3 rolls! This will meet your 140 feet requirement, and give you some tape left over just in case you need it.

Additional information

Weight 20 lbs
Dimensions 12 × 12 × 12 in

3 reviews for Foundation Seam Tape – Butyl Tape 2-inch Wide

  1. gary kofoid (verified owner)

    This stuff is super sticky. Great to use but take your time.
    Hint: take a clean bucket and set tape in while not in use. It WILL pick up everything in it’s side.

  2. Rod Hallman (verified owner)

    Unfortunately this stuff was a disaster for me due to the backing. Stickiness and width is great. The removeable backing is flush with the tape meaning you will struggle trying to pluck the backing out at the corners to get it started to expose the adhesive. The white backing was not too bad, but then enters the clear backing which is a stiffer backing. Piece after piece was wasted trying to get the clear off. Took an hour to prep a 5’ strip. I think I wasted 10’ trying to get the clear backing off.

  3. Rod Hallman (verified owner)

    Correction on above and changing my rating. You cannot pick the backing on the corner with your fingernail on the clear side to get to the adhesive. You can on the white side. It took a bit of playing to figure out that you have side run your finger along the end edge. You will eventually catch the clear backing without it sticking to you. Got it now. This tape is working fine now. You must roll it for a secure stick.

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