12 ft. x 100 ft. 6.5 mil. Viper® CS Crawl Space Vapor Barrier | VIPERCS6.5-12X100

ISI Building Products' 6.5 mil. Viper CS Crawl Space Vapor Barrier is a triple-ply, extrusion-coated, virgin polyethylene membrane. Viper CS 6.5-mil is manufactured using woven high-density fibers yielding the highest strength to weight ratio, tensile strength and puncture resistance of any product of its kind.

• Requires no maintenance once installed
• Will help guard against possible punctures and tears present from rigorous construction traffic
• Can aid in reducing soil gas and poisons, such as methane and radon
• Exceeds all ASTM E 1745 Class A, B and C requirements for under-slab vapor retarders