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 ...

Dark stains on silicone sealants are most likely mould and can be caused by high moisture levels, poor ventilation, organic matter on the sealant surface (including soap, shower gel and shampoo), and ...