Petersen’s Pac-Clad HT high-temperature, self-adhering roofing underlayment helps provide protection against water damage from ice damming and wind-driven rain. The manufacturer says the 40-mil, skid-resistant, high-tensile-strength rubberized asphalt membrane, which is laminated to an impermeable polyethylene film layer, can withstand temperatures up to 250°F and will not crack, dry out, or become brittle. A split-release film eases installation. The underlayment comes in either black (60-day exposure) or white (180‑day exposure).