A caulking gun applies steady pressure on the tube so you can get a smoother and more even finish. You can also apply pressure with your hands, but using a caulking gun decreases the risks of making a mess.
Caulk guns are devices that help people use caulk, a type of sealant, effectively. Caulk is a substance used to seal and adhere, such as closing a gap or crack between a window frame and jamb, or a sink and a vanity.
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