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Understanding sealer options
Sealer producers already reporting significant price increases.
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By Allan Heydorn
Editor
Vance says one of the main things contractors need to be aware of when considering asphalt-based sealers is that they can vary substantially from producer to producer and even from batch to batch.
"What that means to the contractor is it's more difficult to be consistent with the product," Vance says. "It requires more quality control by the manufacturer than does coal tar."
Girish Dubey, president of STAR Inc., says manufacturers have to provide accurate product information to their customers, adding that no manufacturer can claim an asphalt-based sealer or blended sealer meets any specifications because there are no specifications for asphalt-based or blended products.
"All coal tar sealers are produced to meet federal specifications (ASTM -5727, which replaced RP-355e), so all 100% coal tar sealers are similar in that way," Dubey says. "But these specs are strictly for 100% coal tar sealers. There are no specs similar for asphalt-based products."
Dubey adds that contractors need to make sure of bid requirements because if the bid calls for material that meets ASTM-5727 or Federal Aviation Administration specs P-625, P-627, or P-628 then they must bid the job using a 100% coal tar sealer.
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