20 Mil Vapor Barrier — SilverBack® Cord Reinforced (SR)
Upgrade your Crawl Space Encapsulation® with the 20 Mil SilverBack® vapor barrier, engineered for maximum durability and moisture control. This authentic 20 Mil barrier is 30% thicker than other products in the "20 Mil" class. Made with the long term investment in mind, you can't find a better made moisture barrier for your crawl space.
• Actual 20 Mil Thickness – Measured at the plastic, not across reinforcement threads like competitors
• 30 Year Warranty – Warranty belongs to the homeowner and stays with the address.
• Heavy-Duty & Puncture Resistant – Constructed from 100% virgin polyethylene resin with a 1000 denier polyester cord
• No Odor, No Off-Gassing – Free from unnecessary additives, ensuring a safe and clean crawl space
• Bright White Face & Silver Back – Easy identification and premium aesthetics
• Made in the USA – Unmatched quality and durability manufactured in the USA
Crawl Space Encapsulation® Approved
Not all liners offered on the internet in the 20 mil crawl space vapor barrier class are approved for use in a Crawl Space Encapsulation®. GuardianLiner® has met the strict criteria to provide a Do It Once™ installation. SilverBack® meets the following standards:
• 100% made with first use virgin polyethylene resin
• Actual plastic thickness is over .022″ or 20 mil
• Passes Tested Pure™ lab testing standard for odor causing impurities - Tested Safe
• Each roll sold must have an individual serial number
• Meet Class A testing requirements
• Less than .01 perms
• GS1 UPC tracking number
• All rolls have protective wrapper prior to installation
• All layers and welds from factory must be bonded with polyethylene- no glues or tapes
• Minimum 30 year warranty
Available Roll Sizes
• 6'9" x 100' - 675 square foot
- Shipping roll size 87" long
• 13'4" x 50' - 675 square foot
- Shipping roll size 87" long
• 13'4" x 75' - 1,012 square foot
- Shipping roll size 87" long
Ideal For:
• Crawl Space Floors – Strong enough for medium to heavy storage and high-traffic areas
• Crawl Space Moisture Prevention – Approved for use in Crawl Space Encapsulation®
• Stone & Concrete Surfaces – Pair with Felt550® for additional protection on rocky & rough surfaces
Invest in long-term protection! The SilverBack® 20 Mil Vapor Barrier is the ultimate solution for keeping your crawl space dry, clean, and energy-efficient.
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