Shop our selection of caulking guns for your DIY projects.
Here’s how to use a caulking gun.
Press the release at the rear of the gun with your thumb, releasing the plunger at the back of the gun. Pull the plunger all the way back. Put the tube into the gun, with the nozzle in the front. Push the plunger tightly into the back of the tube, and remove your thumb. The gun is now loaded. Cut the tip of the cartridge so that the hole matches the size of the gap you want to fill. Push a nail or pin through the hole to puncture any inner seal. Hold the gun at a 45-degree angle along the gap you want to seal. Squeeze the gun’s handle or trigger slowly while drawing the gun toward you. When you can’t squeeze the handle any more release it. It will automatically spring back. When it is in its original position, you’re ready to press again. How hard you squeeze the trigger and how quickly you move the gun will determine how much caulk is applied at each spot.
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