Gallon, #444, frp panel adhesive, use for fiberglass reinforced panels, may be used over dry concrete, wood studs, plywood, plaster, drywall, polystyrene foam insulation, high strength, fast setting, moisture resistant, non-flammable, no open time required, 30 minute working time, coverage v-notch trowel 1/4″d x 1/4″w x 3/4″ a 50 to 60 sqft per gallon, voc compliant, 10 year warranty.