While some caulk can only be applied in warm weather (40 to 80 degrees Fahrenheit), certain rubber or silicone caulk can be applied in weather as cold as -20 degrees Fahrenheit. The rubber or silicone base prevents the caulk from freezing in cold temperatures.Click to see full answer. Thereof, how cold can you caulk? Cold-Temperature Caulking Caulking with success is possible at temperatures below 40 degrees F. However, caulk in these conditions — particularly when the temperature is below 32 degrees F — usually does not cure well due in part to frost and ice present on surfaces.Furthermore, can you caulk in hot weather? Extreme temperatures can also affect your outdoor caulking projects, because the size of the joint or crack you want to caulk can swell when it is really hot. In addition, caulk can’t cure properly in extremely hot temperatures. Ideally, you should caulk when the temperature is below 90 degrees. Simply so, at what temperature can silicone be applied? TruSil 100 can be applied in a temperature range of -25°F to 120°F. However, for best application results the caulk itself should be at room temperature.How Long Does Silicone take to dry in cold weather? about 24 hours