I’m a renter so I’ve never had to caulk a bathtub or seal a joint in concrete, but I’ve watched as my dad sealed a hole around a doorframe or window with a caulk gun in my family home.

However, only two types of sealants yield the best results ... After shutting all the doors and windows, use a hose to spray water over the windshield. If there's a leak, water will noticeably ...