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remains soft — tracking onto sidewalks and interior spaces . Once the oil spot is conditioned , then apply the oil spot primer . Follow manufacturer ’ s application instructions for primer . Primer can be brushed or sprayed on . Make sure to cover the oil spot and two inches of the surrounding area as well .”
Vacca also said : “ Crack sealing should be completed prior to any sealcoat application . If cracks are left unattended , water can penetrate to the base soaking and swelling the limestone thus destroying their strength and load bearing capabilities . It is evidenced by “ alligator ” cracking , sunken areas , and eventually potholes . Cracks at least 1 / 8 ” or wider should be treated with a least a cold pour sealant which will seal the cracks for a year or so . For a longer-term repair , hot-pour crack sealant should be used . Hot-pour crack sealant remains flexible for a longer period of time and
if used the crack repair can remain effective as long as three to seven years .”
Sealcoat bonding problems appear to be an issue if the paved surface has not been properly prepared .
“ Over the years , I have concluded that the majority of sealcoating failures such as premature wear , flaking , peeling , etc ., happen due to the bonding problems of the sealcoating to the pavement surface ,” said Girish C . Dubey , president , STAR , Inc ., Columbus , Ohio . “ For the proper bonding of sealcoating , it is essential that the surface be cleaned as thoroughly as possible to remove dirt and debris . The adage that ‘ a coating is as good as the surface that it is applied on ’ holds true for all coatings . If the surface is not clean the coating will not bond and with time and usage it will flake or peel off . The extent of cleaning of the pavement will depend upon its condition , simple air blowing or more
involved scraping , wire brushing , blowing or pressure washing .”
Sealcoating manufacturers are meticulous in detailing the aspects of material and surface preparation prior to sealcoating , and urge the applicators to comply with them . Still it is not always possible to cover all the bases , considering the myriad of pavement types , age and the condition .
“ Thoroughly cleaning of the surface that is to be sealed along with repairs of the asphalt surface structure and crack filling of the longitudinal and latitudinal cracks is essential before beginning sealcoating ,” stated Robb Archie , president of U . S . Seal International , Inc ., Reno , Nevada . “ Additionally , you need to apply oil spot primer on the petroleum saturated areas .”
Proper preparation is only part of the sealcoating equation .
“ To me , application of the sealcoating is
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