Westcoat WP-40X Sheet Membrane 6 in. x 75 ft.
WP-40 used for plywood treatment @ 13:29
Westcoat’s WP-40 Sheet Membranes are 40 mil. rubberized asphalt, self-sealing, self adhering waterproof membranes. It is reinforced with a non-woven polyester fabric. WP-40 has a white polyester scrim which allows light foot traffic and a short period of UV exposure. WP-40 is primarily used on all plywood seams. It is also used as a secondary waterproofing membrane in critical situations or any areas where a selfsealing, self-adhering waterproof membrane is needed.
One method of application is to roll out the membrane with the white side up and measure individual lengths with 2 inch minimum overlap. Pull the material tight from each end and remove the 2½ inch strip of the overlap release film and adhere to the deck. Remove the remaining film and adhere to deck. Overlapping ends a minimum of 6 inches.
Another method is to pull 12 to 24 inches of the release film and position the roll where desired. Adhere the membrane firmly onto the deck. Begin pulling the release film in the opposite direction. The roll will follow as the release film is removed. Smooth the membrane as the adhesive back comes into contact with the deck.See More