Joe explains how to caulk the bathroom tub using a caulk gun. You need: - a latex based caulk designed for bathrooms- a damp cloth. Steps: 1. When you start caulking, gently squeeze and move the gun at the same rate as you apply pressure to the trigger. 2. After you've applied the caulk , wipe your finger on the damp cloth and smooth out the caulk with your damp finger. 3. Stop every 12 or 18 inches and wipe your finger on the cloth. 4. Continue smoothing the caulk until you're done.