Carlisle Residential WIP 401LT (Low Temperature) Roofing Underlayment is a 40 mil self-adhering sheet membrane, specifically designed for applications where the ambient temperature is between 30° and 70°F (-1.1°C and 21.1°C). Carlisle Residential WIP 401LT is comprised of a strong, skid resistant polyethylene film laminated to a thick layer of highly adhesive rubberized asphalt. A siliconized release sheet is used to prevent the material from sticking in the roll, and is easily stripped away for installation. |