Grace, 18" x 50', Roof Detail Membrane, A Premier Membrane Based On The Grace Ice & Water Shield Technology, Used As A Flashing To Provide Resistance Against Water Infiltration At Trouble Prone Roof Detail Areas, This New Membrane Has The Unique/Patented Ripcord Feature For Easy Installation At Transition Areas & Allows For Future Tie-Ins, Composed Of 2 Waterproofing Materials: Rubberized Asphalt Adhesive Backed By Layer Of High Density, Cross-Laminated Polyethylene, Seals Around Nails, Will Not Crack, Dry Out Or Rot, Protects Under All Standard Sloped Roof Coverings, Slate, Tile, Cedar Shake, Metal, Asphalt Shingles, Slip Resistant, Roll.