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Silicone caulk generally cures within 24 hours. If it has been over 24 hours, check the silicone caulk Use By date on the package. If the product is older than the Use by date printed on the product, safely dispose of the product.It is too old and will not cure.ilicone caulk generally cures within 24 hours. If it has been over 24 hours, check the silicone caulk Use By date on the package. If the product is older than the Use by date printed on the product, safely dispose of the product.
I followed the instructions on the back of the tube; however, the caulk is taking a very long time to cure. The air temperature and humidity in the air can affect how long a silicone caulk takes to cure or an acrylic caulk to dry.A silicone caulk will cure slower when it is cool and the air is dry (low humidity).An acrylic caulk will dry slower when it is cooler out or more humid.ilicone caulk generally cures within 24 hours. If it has been over 24 hours, check the silicone caulk Use By date on the package. If the product is older than the Use by date printed on the product, safely dispose of the product.