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Updated: July 8th, 2008 05:26 PM GMT-05:00
Understanding sealer options
Sealer producers already reporting significant price increases.
Coal tar might be the best, but contractors have other alternatives when it comes to pavement sealer.
Unlike a number of years ago, most sealer producers manufacture both a refined coal tar sealer and an asphalt-based sealer. Many sealer producers also offer a blended product containing both asphalt and coal tar. Neyra Industries, however, does not produce a blended product because the company feels the two materials are incompatible.
Test strips at Gem Seal where the sealer producer monitors how various formulations of its asphalt-based product and its blended product hold up relative to its coal tar material.
Two of the newest options for sealcoating contractors are asphalt-based sealers that contain extremely small ceramic particles which the producers say strengthen the asphalt-based material and enable it to cure quicker than a pure asphalt-based material or a coal tar material.
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"As that happens the material 'self-polymerizes', cross-linking the asphalt and the mineral particles in the mix at the same time that the mix develops an attraction for the pavement. This squeezing action also drives the remaining water from the mix allowing faster curing."
He says set times and full cure times are generally quicker than coal tar and two coats plus striping can often be done in the same day.
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