High Yield Spray Adhesives expanding foam lessens the use of fasteners and reduces nail pops because of the great adhesion this product provides. This spray sealant expands when applied, then collapses once the drywall board is put in place. This method of applying an adhesive gel not only provides great adhesion but also acts as an air barrier to seal air leakage. The Spray Sealants Gun has an adjustable nozzle that lets you change the spray pattern to cover a variety of widths. Applying the spray adhesive in a spray can reduce the application time and cover more area.