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 ...

This type expands better than silicone, but breaks down faster if exposed to water and sunlight. The smooth rod caulk gun makes applying caulk easy. A midrange-priced one should work. Unless it ...