AdvanTech’s Subfloor Adhesive is a foam-to-gel polyurethane adhesive that expands to fill minor gaps, reducing the likelihood of squeaks. When the adhesive is used with engineered joists and AdvanTech subfloor panels, the company offers a 10-year squeak-free guarantee on the panel-to-joist connection. The manufacturer also says that the adhesive is formulated to stick to wet and frozen lumber. The foam has a 20-minute open time. It retails for around $20 per can.