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Vapor Barrier Manufacturers

Manufacturers of High Performance Vapor Barriers

The following manufacturers make really high-quality barriers. You will not usually find these products at a large home center. It may take detective work on your part. Most large cities have supply houses which cater to concrete masons. They can often be found on the Internet by searching under "Concrete Supplies Your City".

You want a product that meets or exceeds the ASTM-1745 standard.

These out-of-the-way businesses often stock these products. Contractors purchase their products from these specialty businesses for a reason. Hunt around, you may be surprised at what you find. Also, call these manufacturers. They should be able to direct you to a local distributor in your city.


    • Fortifiber Moistop: A waterproof paper with a polyethylene coating on each side.

Fortifiber Corporation. 800-442-2587.


  • Super Sampson: A high-density cross laminated polyethylene.
    Raven Industries. 800-635-3456.


  • Tu-Tuf: A high density cross laminated polyethylene.
    Sto-Cote Products, Inc. 800-435-2621.


    • Clearseal Waterbased Gloss & Seal: Acrylic Sealer.

Tamms Industries. 800-21-TAMMS.

  • Aquapel & Aquapel Plus: A silane siloxane sealer.
    L & M Construction Chemicals. 402-453-6600.

Author's Notes:

I received this email from Michael P, Cincinnati, OH. Here's how he helped with his crawl space problem.

"I live in Turpin Hills and wanted to thank you for your advice for sealing a crawl space. This is our third winter in our home and the basement is always much colder than previous basements from other homes. I did as you suggested and put heavy duty, thick plastic on the gravel and put doors on the opening of the crawl space. It's been a few weeks and I can see water droplets forming under the plastic. I may put a second layer of plastic for good measure. The basement is warmer and so is the room above the crawl space. I don't smell the mustiness either. Thanks again for the tip."

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