Products / Atlas WeatherMaster Ice & Water 200

WeatherMaster Ice & Water 200 is Atlas's granular-surfaced, self-adhering ice and water underlayment of fiberglass-mat-reinforced SBS-modified asphalt, sealing to the deck and around nails against ice dams and wind-blown rain. Atlas's product page lists a 45-day UV exposure, high-temperature stability to 240 degrees F and eligibility for the Atlas Signature Select roofing system; the data sheet gives a 36 in. x 65 ft. roll (195 sq. ft.), a 40 mil minimum thickness and a pass on ASTM D1970, and shows it applied to at least 24 in. inside the interior wall line.