Dap® 00042 SmartBond™ Subfloor Gun-Grade Construction Adhesive, 20 OzSmartBond Subfloor Gun Grade Polyurethane Adhesive Foaming Gel for interior and exterior applications. Bonds to wet, dry, frozen and treated lumber. Faster and easier to use than traditional cartridge adhesives. Provides 8 times the coverage of cartridge adhesives, meaning you can do more with less. Applies as a foam and transforms into a high strength, fast curing gel. Excellent adhesion and gap bridging with a 20 minute open time. Use with SmartBond