The curing rate of mixed sealants varies with changes in temperature and humidity. Curing of sealants will be extremely slow if the temperature is below 60 °F. A temperature of 77 °F with 50 percent relative humidity is the ideal condition for curing most sealants.
Curing may be accelerated by increasing the temperature, but the temperature should never be allowed to exceed 120 °F at any time in the curing cycle. Heat may be applied by using infrared lamps or heated air. If heated air is used, it must be properly filtered to remove moisture and dirt.
Read more http://www.flight-mechanic.com/nonmetallic-aircraft-materials-part-six-seals-part-two/
Read more http://www.flight-mechanic.com/nonmetallic-aircraft-materials-part-six-seals-part-two/