GE-branded silicone sealants can be applied in a temperature range of 40° F to 100° F. However, for the best application, the sealant itself must be at or above room temperature. Most of our acrylic caulks/sealants must be applied when the temperature is 40° F or higher. Generally, it’s important that the surface be clean, dry, and frost-free for the caulk/sealant to properly adhere to the surface.