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- Tool that applies caulk from cartridges to work area.
- Ratchet Guns are less expensive, but are more difficult to use. To stop caulk flow on the ratchet gun, the user must turn the piston so the ratchet disengages.
- Smooth Rod Guns are more expensive, but are easier to use. With a smooth rod gun, the user simply disengages a quick-release thumb plate to stop the flow of caulk. Drip-free smooth rod caulking guns allow the piston to back up slightly after each squeeze so the user does not have to turn the piston or depress a lever to stop the flow of caulk.
- Some models use an automatic vacuum action to draw any unused caulk back into the nose of the tube.
- Power Guns that operate with a rechargeable battery pack are becoming popular with pros and serious d-i-yers.