Self-adhesive membrane that eliminates the need to cut shingle tabs. Comes with a seal tab to prevent wind uplift at the roof edge. Fast installation and the membrane is waterproof and self-sealing around nails and other penetrations. Shingle Starter is adhered directly to the roof deck. Apply on areas that will receive shingles the same day. Airborne dirt and debris can affect the seal tab's ability to properly seal to the shingle. 7.2" x 33.5'. This product is 50 mil. thick with a black, granular surface. The roll's hard core prevents collapse of roll and humping on the deck surface.