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Crack Sealing |
| The cracks over 1/4" in width
willl be cleaned using a "heat lance". The lance
uses compressed air and propane to blast a stream of hot
air directly into the crack to blow out dirt and debris.
The heat also dries up any moisture and improves the bonding
surface for the sealant while drying any moisture. The
sealant is indirectly heated in a double boiler melter,
which is heated to 375Ú. The sealant is then injected
directly into the crack by a hand wand with a steel shoe.
This shoe slides along the surface leaving a neat, uniform
band of sealant approximately 1.5" wide along the
crack. All application equipment and materials meet Federal
Specifications SS-S-164 and ASTM 1190. |
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