Blueskin RF200LT Low Temperature Roof Underlayment is an SBS modified bitumen roofing membrane underlayment reinforced with a superior skid-resistant polyethylene surface film.  The product uses a compound specially designed for better performance and handling in cold temperatures. It is used as a secondary waterproofing layer on slope roofs, in both residential and commercial buildings, protecting the building’s interior from damage caused by water infiltration as a result of ice dams or wind-driven rain. It is designed to be adhered directly to wood, gypsum decks or certain insulation panels prior to the application of finished roof coverings including architectural metal, shingles, cedar shakes or tile.