Foster® 30-65™ Vapor-Fas™ WB Coating is formulated for indoor and outdoor commercial use. It has a mild latex "paint type" odor and is designed for use on pipes, vessels, ducts and equipment operating between 32°F (0°C) and ambient temperatures. Vapor-Fas WB Coating has a WVTR rating in the range of other competitive water based vapor barrier coatings. For increased vapor barrier protection and for heavier duty commercial or industrial use select Foster® 30-80™ Vapor-Safe® Coating or Foster® 30-90™ Vapor-Safe® Mastic.