Seal Trust?Patch Disks are uncured roofing membrane available in black with butyl mastic sealer die cut into 8? round disks. Can be used for flashing corners, as repair patches, or t-patches and anywhere required on EPDM, and most TPO membranes. Membrane must be cleaned prior to installation using Tape Primer. Application Instructions: Patch Disks are a multi use product used in inside/outside corners, t-joint covers, and patching or repairs of both EPDM and TPO membranes. Always clean and prime membrane using roofing industry standard products for tape applications.Lap Caulk should be used around all the outer edges of the disk for proper application. Use 3? steel roller for final installation step. Be careful to avoid fish mouths or air bubbles. Color Black Size 8.5? Nominal Thickness 80 mils Adhesive Type Butyl-based Adhesion To most clean, dry substrates/surfaces Application Temperature Temperature must maintain 40F and above for at least 48 hours Resistant to Weather, water and water vapor, (5%) acidic or basic solutions Effected by Petroleum, grease, oil, solvents, vegetable oils, and animal fats Storage Store in warehouse without excessive heat. Do NOT store long term on roof Shelf Life 1 year if stored between 60F and 80F