#805 Commercial Grade Roof Cement is a multi-purpose heavy consistency Plastic Cement for repairing leaks, cracked spots, holes in shingles, concrete and metal roofs or steel. It can be used on flashings around skylights, gutters, and in most crevices. #805 is ready to use as it comes out of the pail and can be applied with a trowel or knife and readily adheres to most prepared surfaces and will not sag, slip, or mud crack, and will remain highly resilient and durable through all seasons.