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A loose undermount sink is more than a cosmetic problem. If the sink begins separating from a granite, quartz or other stone countertop, the opening can allow water into the cabinet below and place additional stress on the sink connection. Undermount sink repair should address both support and the seal around the sink rather than simply covering a visible gap with more caulk. A recent HANDLD project involved a double-bowl stainless steel undermount sink beneath a stone counte