Many times after asphalt
is seal-coated you will notice very fine crack throughout the entire
sealer. We refer to this as spider webs or the alligator effect. If
these "spider webs" are more than just surface cracks
the sealer can flake off and blow away after just a few short months.
webs" are caused by the sealer drying to fast or drying from the
inside out. Sealer is like latex paint, both are a water soluble
products. That is, both latex paint and sealer uses water as a carrier
get the paint or sealant to the surface. The water evaporates out
leaving the paint or sealant behind to do its job. If the water leaves
to fast the paint or sealer will crack leaving behind our "spider
webs". The faster the water leaves the more severe the cracks.
During the summer months the asphalt becomes very hot from the sun
beating down. As soon as sealer hits the pavement water is being evaporated
into the asphalt as well as into the atmosphere. Water leaves
twice as fast. If the sealer is applied to thick, this increases the
This can be
prevented by applying the sealer early in the day, or by wetting down
the asphalt before sealer is applied. WARNING
To much water will dilute your sealer.
Another technique is to apply two thin coats (allowing the sealer to
cure between coats) instead of one heavy one. To most people this means
double the work, to those of us who understand seal-coating this
means double the quality without the problems.