The patented waffled base significantly improves bonding power! The adhesive requires a 28-day cure time above 50 Degrees F. Large three-inch face tapers to a 1.5-inch base that fits the most popular 36" metal panels with three 12" flats or four 9" flats without the need for rib straddling! Adhesive-mounted snow guards have a release factor that will not cause metal panel damage or roof leaks, In the event of an overload release, they can be remounted to the same spot. Independent ATI lab tests show 1,379 lbs. holding strength with adhesive mounting when properly cured for 28 days. SnoBlox polycarbonate plastic snow guards are made of UV-stable virgin-grade polycarbonate. All our products are proudly made in America! Snow Guards are rooftop devices that help prevent snow slides and the dangerous movement of snow and ice. While adding beauty and function, our clear polycarbonate snow guards help prevent damage from a metal roof snow avalanche while remaining practically invisible. The SnoBlox Deuce is our most popular model because it fits most metal roof panels. Kit Includes 150 Clear Polycarbonate SnoBlox Deuce Snow Guards and 6 Tubes of Surebond Everseal SB-190 Clear. (Requires 28 days at 50 degrees or above to fully cure.) Placement of snow guards in isolated areas such as chimneys, doorways, vents, and partial roof sections is NOT recommended. Detailed instructions for installation can be seen in pictures. Always obtain a spacing layout before installation. Follow the suggested layout to assure your satisfaction and to validate the warranty. A spacing recommendation and layout tool for snow guard placement is available online.