Crawl Space Encapsulation Supplies

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Home of the Only Authentic Crawl Space Encapsulation® Products


Crawl Space Encapsulation® Products and Vapor Barriers

Crawl space encapsulation® products and vapor barriers offered by® is not only the most rated, but the highest rated by the actual customer that purchased and installed the products.® offers only the best products and we have the best people ready to help you with your project. Whether you have technical questions or need help completing a payment you will not find better trained or more willing folks to partner with. See for yourself here- Crawl Space Reviews.

We source as much as possible from manufactures in the United States. ALL of our craw space vapor barriers and crawl space liners are manufactured in the US. If you visit our online store you can shop by products made in the USA. Look for the category “American Made Products”.

Please note that we have far more products than what is displayed here at our online store. Click "SHOP" in the menu above.

Crawl Space Vapor Barriers

20 Mil SilverBack®

20 Mil Crawl Space Vapor Barrier

The 20 Mil SilverBack® vapor barrier is our premier crawl space liner. It is Made in America and measures a true thickness at the plastic, not the thread. It is made from 100% virgin polyethylene resin and is string reinforced. 100% inert means no off gassing or VOC’s and it naturally resists mold and mildew growth. This product is IN STOCK and ships next day or sooner. 105 MSF

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20 Mil GuardianLiner™

20 Mil Crawl Space Vapor Barrier

The 20 Mil GuardianLiner™ is an American Made vapor barrier with added antimicrobial to enhance it's natural ability to resist mold and midew growth. This crawl space vapor barrier can be directly compared to the CleanSpace™ brand liner. Manufactured to be an alternative to the white/blue franchise product, the 20 Mil GuardianLiner™ will deliver performance and longevity for your crawl space encapsulation® project for decades. 85 MSF

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**ALL of our crawl space liners/vapor barriers are odor free and do not off gas like the cheaper priced knockoffs. PLEASE compare out quality to others, our samples are free.

Crawl Space Liners

6 & 8 Mil DiamondBack™ Liner

8 Mil Crawl Space Liner

This crawl space liner is American Made. It is a string reinforced polyethylene vapor barrier that is white on one side and black on the other. The DiamondBack™ naturally resists mold growth, does not off gas or have any VOC’s. 30 and 38 MSF

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12 Mil GuardianLiner™ W/Anti-Microbial

This 12 Mil crawl space liner is American Made. It is a string reinforced polyethylene vapor barrier that is white on one side and cream on the back. The 12 Mil GuardianLiner™ naturally resists mold growth, does not off gas or have any VOC’s. 60 MSF

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12 Mil DiamondBack™

The popular 12 Mil DiamondBack™ crawl space liner is a great all around vapor barrier that has NO additives, odors or pinholes. It is American Made, like all of our crawl space liners. This vapor barrier can be directly compared to most other "12 mil" class vapor barriers or retarders. 

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12 Mil HSU™ Liner

This 12 Mil crawl space liner is an excellent vapor barrier for crawl space encapsulation®. It is made by laminating three layers together; The HSU does not use polyester threads to reinforce the plastic, but instead gets it’s reinforcement from polyethylene ribbons.

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Crawl Space Accessories

WaterProof Pro Seam Tape™

This crawl space tape is used to seal the seams of the crawl space vapor barrier/liner. It comes in rolls 4" x 187' (compare to others rolls at only 108') and is white to match all of our barriers. Because this crawl space tape is white, does not make it the same quality as all other tapes that are white.

Crawl Space Tape More Info

Foundation Seal Tape™

Foundation Seal Tape™ (FST) is used to seal the crawl space vapor barrier/liner to the foundation wall. This tape is 1.5" x 108' and has a reinforcement inside the tape to eliminate stretching like bubble gum.

Foundation Tape™ Pricing and Details

Foundation Pins™

The Foundation Pins™ are used to permanently secure the crawl space vapor barrier/liner to the foundation wall. These pins are inserted into a 1/4" hole drilled by a hammer drill. They are to be installed every two foot and are made of heavy gauge white plastic.

Foundation Pins™ Pricing and Details

Felt 550®

Felt 550® were designed to protect the crawl space vapor barrier/liner from punctures due to sharp rocks, concrete and metal in the crawl space. We highly recommend…

Felt550® Pricing and Details

Crawl Space Water Control

InstaDry® Sump Kit™

The InstaDry® Sump Kit™ offers a 3 year warranty on the pump. 100% of all the parts are made in America, even the hose clamps! It features our exclusive Anti-Float Plate design. Crawl Space Sump Pump and parts you see pictured are included

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InstaDry® Sump Basin

This sump pit is designed to be used as a collection point for Radon gas as well as house the Liberty 237 sump pump. It has a 3" vent hole in the lid for venting Radon gas and odors outdoors. Includes Lid and Seals

InstaDry® Sump Kit Pricing and Details

Liberty Sump Pumps

Item is a 1/3 HP submersible sump pump. It carries a 3 year manufacture warranty and is capable of pumping 45 GPM. Very dependable and highly rated among professionals. Liberty is a family owned business…

Liberty 237 Pricing and Details

Premium Water Alarm

This premium water alarm will alert you if the sump pump fails in the crawl space. It comes with a float switch that is mounted inside the sump basin and will allow additional sensors. On the dashboard there is a control to test the alarm as well as to silence it.

Water Alarm Pricing and Details

Crawl Space Soil Gas & Odor

Soil Gas Testing

Test for Radon Gas, the second leading cause of lung cancer. You can not see, smell or taste Radon Gas. This test kit will help you determine if you have a Radon Gas Problem. Lab results, and shipping are included.
Add this product to your cart at no cost as long as you purchase one of our vapor barriers in the same order.
Soil Gas Test Pricing and Details

Soil Gas Mitigation

This fan is used to evacuate soil gases like Radon, Methane and other harmful gases emitted from the soil. It comes with 3" collars so it can be used with our Instadry® Sump Kit™ and Sump Basin.
Soil Gas Fan Pricing and Details