Use as a crack or joint filler for interior or exterior surfaces. For sealing windows and doors, siding, trim, gutters, flashing, ducts, vents, etc. Adheres to fiberglass, concrete, glass, brick, ceramics, formica and most building materials. Elastomeric, high performance clear sealant. Permanently flexible. UV resistance. Meets ASTM Specification C920. Covers approximately 55 lin. ft. at a 3/16" dia. bead.