29-1/2 in. x 100 ft. BlockShield SA Air, Water, and Vapor Barrior Membrane | VAP-37503400

Vapro's BlockShield SA is a lightweight, self-adhered air, water, and vapor barrier membrane

• Impermeable to air, moisture vapor, and water
• Non-asphaltic product
• 12 month UV and weather exposure
• No primer required
• Approved ASTM E2178/ASTM E2357 air barrier tests
• Approved CAN/ULC S741-08, CAN/ULC S742-11