Viper CS II 10 mils is a high performance crawl space vapor barrier designed to prevent moisture migration from the soil into the crawl space. Viper CS II 10 mils helps guard against mold, mildew, allergens, fungus, radon gas, methane gas, heat loss due to damp insulation, wood rot and overall degradation of the crawl space. It is a white , multi-layer, plastic extrusion manufactured from prime virgin polyolefin resins. Weight 85 lbs. per 1,400 sq. ft.
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