12 Mil Vapor Barrier — High Strength™ with GuardianLiner® Anti-Fungal
Upgrade your crawl space moisture protection with High Strength™, a 12 mil vapor barrier designed for maximum durability, tear resistance, and moisture control. Uses a blown film on the white side to improve the moisture and wear performance. High Strength™ vapor barrier outperforms imported string-reinforced liners, offering superior protection for your home. With a 30-year warranty, it's a smart long term investment to prevent moisture damage, improve indoor air quality, and extend your home’s foundation life.
Why Choose High Strength™?
• 30 Year Warranty – Warranty is for the homeowner and stays with the home
• Superior Strength & Tear Resistance – Reinforced with woven polyethylene ribbons, this vapor barrier resists punctures, tears, and wear, even in harsh crawl space conditions.
• 100% Virgin Polyethylene – Made from pure, high-quality polyethylene for long-lasting performance and odor control.
• Mold & Mildew Resistant – Features an anti-microbial & anti-fungal treated tan backing for extra protection against mold, mildew, and moisture-related issues.
• Actual 12 Mil Thickness – Unlike some competitors, GuardianLiner® HS maintains a true 12 Mil thickness across the entire surface.
• Ideal for Floors & Walls – This versatile vapor barrier enhances crawl space encapsulation and improves overall home energy efficiency.
• Made in America– Proudly manufactured with the highest quality standards for durability and reliability.
• Authentic- Approved for Crawl Space Encapsulation®
High Strength™ — Built for Long-Term Protection
Designed to handle the toughest crawl space environments, Hight Strength™ ensures your home stays dry, protected, and energy-efficient. Whether you're looking to prevent moisture damage, improve indoor air quality, or increase the longevity of your home’s foundation, High Strength™ is a smart investment.
Crawl Space Encapsulation® Approved
Not all liners offered on the internet in the 12 mil crawl space vapor barrier class are approved for use in a Crawl Space Encapsulation®. DiamondBack™ has met the strict criteria to provide a Do It Once™ installation. DiamondBack™ meets the following standards:
• 100% made with first use virgin polyethylene resin
• Actual plastic thickness is over .012″ or 12 mil
• Passes Tested Pure™ lab testing standard for odor causing impurities
• 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
• 30 year warranty
Available Roll Sizes
• 36" x 85' - 255 square foot per roll
- Shipping roll size 4" x 4" x 36"
• 46" x 85' - 325 square foot per roll
- Shipping roll size 4" x 4" x 46"
• 6' x 85' - 510 square foot per roll
- Shipping roll size 6" x 6" x 72"
• 12' x 50' - 600 square foot per roll
- Shipping roll size 6" x 6" x 72"
• 12' x 85' - 1,020 square foot per roll
- Shipping roll size 8" x 8" x 72"
VIEW GUARDIANLINER® HIGH STRENGTH™ SPECIFICATIONS
and then Add to Home Screen.