GAF LRF Adhesive XF is a twocomponent, construction-grade, low-rise polyurethane foam roofing adhesive. It is designed to adhere most roof insulations, vapor retarders, and cover boards to compatible substrates as well as to adhere fleeceback single-ply membranes. The "Part A" and "Part B" components are dispensed from two pre-pressurized disposable cylinders utilizing a twocomponent disposable foam applicator. It is cost effective and allows for faster membrane installation than traditional GAF bucket and roller adhesives.