In its native form, [Clint]’s K-441 is a caulking gun, able to apply silicones, resins, and liquid rubber from a reservoir with compressed air. It’s accurate, powerful, has a huge capacity ...

A dedicated caulking gun allows you to apply the sticky, gooey product quickly and cleanly, and as long as the gap you’re working with isn’t wider than a ¼-inch thick, it should completely ...