MMT Acoustix® Spray Adhesive is a super - strong,aerosol-based adhesive. It comes in a 450 ml spray can, very easy to use. MMT Acoustix® Spray Adhesive provides a permanent bond and one spray mounts up to 80 square feet of foam or diffusors, depending on thickness.Holds the panel to the surface forever. Does Not stink post usage. Clears from the environment in2 hours.