CRL M66 Textured Polyurethane Construction Sealant is a one part, multi-use moisture curing caulk with no primer needed on most construction type applications and surfaces. This excellent sealant is designed for general purpose usage on concrete, window frame border and various types of construction joints. This excellent polyurethane sealer adheres to common surfaces such as brick, concrete, aluminum, vinyl, wood, and granite and can be used for exterior and interior use. CRL M66 is compatible with insulating glass sealants when glazing units and applied as a toe or heel bead. It is suitable for continual immersion in water with the appropriate primer. CRL M66 Textured Polyurethane Construction Sealant withstands temperatures after full cure from -40°F to 180°F. It can be painted after a full cure (minimum 72 hours). It is also suitable for varied manufacturing uses, such as the production of moving trailers and mobile homes, and in the joining of galvanized air conditioning ductwork.