Cold weather will not permanently harm urethane or silicone materials. It will cause these materials to thicken and separate. If a customer tries to use the material while it is cold, it will not cure.
If the material becomes cold, there are two things required to bring materials back to good working condition;
- Allow the materials to reach room temperature (at least 73°F/23°C) in the containers before opening. Depending on how long the materials were exposed to cold temperatures, it can take several days to bring them up to 73°F/23°C.
- Urethane or Silicone Rubber - Bring material up to room temperature. Before using, open Part A container and mix thoroughly (3 minutes) with a flat edge stirring paddle before dispensing into a mixing container. Open Part B container and mix thoroughly (3 minutes) with a paddle before dispensing into a mixing container. Silicone curative Part B in glass bottles can be shaken before dispensing.
- Urethane Plastic - Bring material up to room temperature. Trial or 1 gallon units can be shaken thoroughly before dispensing material. 5 gallon buckets should be opened and pre-mixed with a flat edge stirring paddle for 3 minutes before dispensing material.