3M(TM) Fastbond(TM) Insulation Adhesive 49, 5 gal pail, 1 per case 3M(TM) Fastbond(TM) Insulation Adhesive 49 is a water-based, high solids, fast tacking, pressure sensitive adhesive. Bonds lightweight materials like fiberglass insulation, felt, shoddy, paper and other materials to metal and many other surfaces.