Henry Pro Grade 957 Silicone Fibered Sealer 2 Gallon Pail

Henry Pro-Grade 957 Silicone Fibered Sealer is a flexible mastic membrane reinforced with fibers. This sealant patches and repairs cracks, breaks, tears, and holes. Pro-Grade 957 cures quickly and provides immediate waterproofing. Its typical uses include rough areas of SPF roofing, drain bowls, and under and around rooftop-mounted equipment. It can also be used to repair direct-to-metal repairs, smooth built-up, smooth modified bitumen, granulated modified bitumen, aged single-ply roof membranes, flashings, fasteners, and drains. It is recommended to prep the surface before applying the silicone roof sealer by removing any debris, and contaminants (such as chalk, wax, and grease), and using a wire brush to remove any rust and scale. The surface must also be dry and frost-free. To apply, work 1/8 to 1/2 inches thick of sealer into cracks or breaks with a trowel or a putty knife.