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.

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 ...

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.