Versi-Tite Window and Door sealant from RHH Foam Systems Inc. is a one-component polyurethane foam used to seal small gaps and crevices. It dispenses from the can in a 3/8-in. caulking bead. The moisture-cured product should not be used to fill voids larger than 1 in. Packaging options include 12 oz. straw foam, 24 oz. straw or gun foam and 16-lb. tanks.