Q: My landlord’s novice repair person caulked around the bathtub — twice. Both times, the caulk pulled away from the wall. Why? And what’s the right way to do it? A: New caulk doesn’t stick well to ...

Whether it is to seal windows, weatherproof your roof, or make your bathroom tiles fit together perfectly, there are plenty of reasons why a caulking gun belongs in your tool box. These days, there ...