Foamnseal FNS 300 Polyurethane Foam Dispensing Gun / Tool Provides precise control for filling, sealing and insulating gaps, cracks and window/door jambs Teflon coated canister adapter. Stainless steel check valve Good bead control, allows variable bead size No post-dispensing foam drip.Less foam waste. Restartable for up to 30 days Compatible with Great Stuff Pro, Touch n Seal, Fomo Handi-Foam, Handi-Stick, Seal Pro Guns