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 ...

Most caulking mistakes occur when the product ... Rutland Furnace Cement seals metal-to-metal or metal-to-masonry joints, so it's perfect for ceramic logs, stoves and firebrick.

Next, clear debris from the joints themselves ... to 1/2-in. layer of caulk top out just below the concrete surface. Using a metal scraper can let you avoid scraping your knuckles on the concrete.