Used by concrete and masonry repair contractors, the Carbide Caulk Cutter quickly removes hard and semihard mono-sealants and urethane sealant materials from existing joints. When used on a standard angle grinder, the product chunks the joint sealant material out for easy cleanup, rather than creating fumes and dust. The cutter is available in 4 and 7 inches. Star Diamond Tools Inc. 800-282-6470.