MFM W3 Tape Universal Self-Adhering Window Tape A self-adhering, self-sealing, multipurpose waterproofing tape designed for use around windows, doors, under siding, exterior plaster, sealing sill plates and wall joints, or in any application where the membrane is protected from long-term ultraviolet exposure. The W3 Tape rubberized adhesive waterproofing compound self-seals around punctures such as nails, screws, and staples. The advanced system will bond to the substrate and will seal around fastners to prevent damage caused by penetration. It is composed of a white polymer film that is coated with aggressive rubberized asphalt adhesive. A release paper protects the asphalt and is removed as the tape is installed. W3 Tape adheres aggressively to most clean, dry substrates including metal, wood, vinyl, housewrap, and masonry. This product can be applied at temperatures no lower than 35 deg. Thickness 25 Mm. 10 year limited warranty. Size 6 In. x 75 Ft., Color White, Thickness 25 Mil., Pkg Qty 1