DAP SmartBond 20 oz. Subfloor Gun-Grade Gel FoamMARTBOND SUBFLOOR is a high strength polyurethane foam adhesive that is faster and easier to use than traditional cartridge adhesives. A single can of SMARTBOND provides 8X the coverage of traditional cartridge adhesives, so you can do more, with less. Features & Benefits 8x more coverage 25% faster to apply Polyuretheane strength VOC Compliant Bonds wet, frozen & treated lumber Recommended by Georgia Pacific for best results when uing GP DRYMAX High