Sealant Application Tips for Cold Weather Caulking

To assist those who are working in colder areas around the country, we have compiled a list of eight tips to remember when installing a sealant at lower temperatures.

  1. Joints MUST BE clean, dry, and frost free when temperatures are below freezing
  2. Sealants should be stored at room temperature prior to use
  3. As temperature of the sealant drops, viscosity increases, and workability becomes difficult
  4. Silicones are generally more “workable” at lower temperatures
  5. Both urethane and silicone will continue to cure with no adverse effects on ultimate properties at lower temperatures, but the cure time rates will be significantly reduced. Curing comes to a virtual stop at temperatures below 10° F
  6. Water based sealants such as acrylic latex should NOT be used at temperatures below freezing, They’ll Freeze!
  7. Slower cure rates induced by colder temperatures increase the possibility of “slumping” when caulking a joint greater than 1.0”
  8. At colder temperatures, joints are generally at their widest. Tooling to concave configuration becomes more important in that most stress and strain on the sealant will come from compression as opposed to extension. This can result in bulging of the sealant during summer months
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