High temperature resistant. Self-adhered with superior adhesion Made of aggressive rubberized asphalt and polyethylene film. Slip resistant and seals around fasteners Protects under all sloped roofs. Up to 120 days UV exposure Covered by CertainTeed's SureStart Warranty Roll Width: 36 Inch for both sizes. Available Roll Lengths: 66.6 Feet and 75 Feet Roll Coverage: 200 square Foot (2 Square Roll) for the 66.6 Foot Roll and 225 square Foot (2.25 Square Roll) for the 75 Foot Roll Roll Weight: 56 pounds for the 66.6 Foot Roll and 61.4 pounds for the 75 Foot Roll 40 mils thick Tensile strength membrane: 250 psi (1720 kN/m2) Grace Ice & Water Shield? HT high temperature self-adhered roofing underlayment is a premier membrane designed to deliver premium in-place performance for high temperature applications. It is composed of two waterproofing materials?an innovative and proprietary rubberized asphalt adhesive combined with a high performance polymeric film with UV barrier properties. The rubberized asphalt surface is backed with a foldless release paper that protects its adhesive quality. During application, the release paper is easily removed, allowing the rubberized asphalt to bond tightly to the roof deck. The Ripcord? embedded in the adhesive provides the applicator a EEgsplit release on demandEEh feature, making it easier to apply in detail areas.