UFC 3-270-03
15 March 2001
CHAPTER 11
CRACK SEALING PROCEDURES
11.1. Description. The crack sealing operation should only be conducted when pavement
temperatures are above 50 degrees Fahrenheit (10 degrees Celsius). Application temperatures
for hot-applied crack sealants should constantly be monitored to ensure that they are in the
correct range.
11.2. Preparation. Crack faces should be clean and free of moisture. If moisture is present, a
hot-air lance or compressed air can be used to dry the crack face before sealing. The crack must
be filled from the bottom up to prevent air from becoming trapped under the sealant and cause
bubbling. The crack must also be filled from beginning to end in one smooth operation whenever
practical (Figure 11.1.). For hot applied sealants, at the end of a day's work, the sealant
remaining in the pot must be removed and discarded. Do not reheat and use.
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