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Bathroom caulk creates a waterproof barrier between the shower or bathtub and the wall, thereby preventing water damage. Over time, however, the silicone breaks down and cracks, which lets in moisture and allows mold to grow. To renew the water-resistant seal, chip away the old caulk, and apply a fresh bead of silicone. Not only will your bathroom be protected against water damage, but it will look fresher too.
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