My stone fabricator/installer installed Azul Macaubas over a plywood rough deck with white latex caulk. The stone has dark spots at all of the caulk locations. We waited about 4 weeks for the spots to disappear, but only the ones getting sunlight lightened, and only slightly. We removed the slab from the island and the fabricator has been applying an acetone poultice and letting it sit in the sun, as well as applying heat with a fan heater. After 3-4 weeks, the spots have lightened some, but I don't know how long to expect this to take or if the spots will ever completely disappear. Any suggestions?
Thanks.
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