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There’s a wide range of quality 20 mil vapor barriers on the market, but which one are the best? Which are accurately priced? Which last the longest? In this article, we’re going to look at some of the most popular 20 mil vapor barrier brands and see what makes each one of these special.

20 Mil SilverBack Crawl Space Vapor Barrier

The 20 Mil SilverBack™ is made from 100% virgin polyethylene resin and reinforced with a 1000 denier polyester cord. This crawl space vapor barrier is idea for use on the crawl space floor because it is an acutal 20 mil. We say it is an actual 20 mil because it is measured at the plastic and not across the raised reinforcement threads like other brands are. This makes the SilverBack™ 20 Mil 30% thicker than the competitors 20 mil.

Comparing product weights the 20 Mil SilverBack™ comes in at 105 pounds per 1000 square feet of product or 105 MSF while the closest competitor’s 20 Mil is only 83 MSF and another 74 MSF.

The SilverBack™ brand is Made in America and does not contain any additives. There is no odor or offgassing with this crawl space floor liner.

20 Mil GuardianLiner™ Crawl Space Vapor Barrier

Looking for an affordable crawl space liner in the 20 mil class? The GuardianLiner™ is a vapor barrier designed to match up in appearance and performance with the Cleanspace™ brand head to head. Although lengths and widths are different the barrier’s formula is comparable.

Both product’s outer layers are made from 100% virgin polyethylene resin and reinforced with a 1000 denier polyester cord. They even have very similar weights, with the GaurdianLiner™ made with 85 MSF and Cleanspace™ made with 83MSF. MSF= Pounds of plastic per square foot of product.

Although products like these naturally resist mold and mildew growth they both have an added anti-microbial to in enhance this characteristic.

If you are looking for an alternative to the high priced Cleanspace brand crawl space liner, look no further than the 20 Mil GuardianLiner™.

SilverBack™ And GuardianLiner™ Compared

While the SilverBack™ and GuardianLiner™ are among the best 20 mil vapor barriers to use, when compared to one another, we give the edge to the SilverBack™. Consumers agree, the SilverBack™ has received a lot of high marks from homeowners. While the GuardianLiner™ has received high marks, the quantity is much lower.

The 20 mil vapor barrier is commonly used to cover crawl space floors that have heavy traffic and storage. Both the SilverBack and GuardianLiner have a high reputation and we feel very comfortable recommending them to homeowners.