Technical Bulletins


Temperature Recommendations for Various Grades of Roof Cements

The laboratory recommends the following temperature ranges for using summer, semi- and winter grades of flashing cements:

Winter Grade: Below 50°F - 75°F
Semi-Grade: 50°F - 75°F
Summer Grade: 75°F - 120°F

This should give enough leeway that if the temperature varies slightly, the contractor won't have problems. What we don't want to see if someone going outside on a 60°F morning with winter grade material, then have the temperature go up to 85°F, and the material sags due to the excess solvent in the winter grade.

Note: If there are any questions, please contact Karnak's Technical Service Department : 1-800-526-4236, or Fax requests to: 908-388-9422.

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