Blue Shield AS Black Hardwood Floor Underlayment – 3′ x 140′

Blue Shield AS Black Hardwood Floor Underlayment is a dependable and cost-effective vapor retarder designed to help protect wood flooring installations from moisture-related damage. Constructed from durable asphalt saturated kraft paper, it provides balanced vapor control while also helping reduce sound transfer and improve floor stability. Ideal for residential and light commercial applications, Blue Shield AS installs easily and delivers reliable long-term performance beneath wood and tile flooring systems.

Features & Benefits

• Semi permeable vapor retarder helps reduce moisture transmission
• Passes ASTM D 779 water resistance testing
• Helps suppress sound and improve flooring stability
• Manufactured from durable 73.5 lb/rm kraft paper with 26.5 lb asphalt saturation
• Permeability rating of 17.4 perms with WVTR of 119.1 g/day/m²
• Easy to install over properly prepared subfloors
• Suitable for residential and light commercial flooring projects

Recommended Applications

• Wood flooring underlayment
• Tile flooring installations
• Small commercial flooring projects
• Industrial wrap applications

Installation Notes

• Install over clean, dry, level, and debris free subfloors
• Not recommended directly over basements or crawl spaces without additional moisture mitigation
• Follow NWFA guidelines and all local building codes during installation

Storage Recommendations

• Store between 60°F and 70°F with 40% to 50% relative humidity
• Use within 1 year to maintain optimal performance