Then use your knife or tool to scrape along the tub or shower floor. Photo 2: Loosen and remove the remaining caulk. Squirt caulk remover on all the remaining caulk and let it do the hard work.

Mold loves moisture, and no place in the house has more of it than the inside of the shower. Given the chance, mold will grow in tile grout, on tiles, around the drain and on the caulking.

We put eight caulks and sealants to the test in our labs—we evaluated cure time, durability, adhesion, and more I’m a renter so I’ve never had to caulk a bathtub or seal a joint in concrete, but I’ve ...