Pro-Grade 928 Pitch Pocket & Self-Leveling Roof Sealer is a one-component, moisture-curing sealant designed to reduce flow and sag properties in order to improve the hang of the sealant on low and semi-steep sloped applications. It is used to seal fasteners on low and semi-steep sloped metal roofs by applying a dollop of sealant to each fastener head, which completely encapsulates the fastener and seals the perimeter to the metal panel. This self-leveling sealant forms a watertight seal for pipe penetrations through roof decks in metal pitch pocket flashings, with zero shrinkage. It is fungus and mildew resistant, and easily applied in a standard cartridge.