With today's technology, we're not going to expect an asphalt-based sealer to go mile for mile with a coal tar emulsion. That may change in the future" Mariani says GemSeal's asphalt-based sealer ...

Dubey says many contractors simply asked clients to postpone the work until 2007 rather than switch to asphalt emulsion sealer. "Some of the contractors said they'd rather wait for coal tar than ...

Coal tar sealant: The number-one sealant to ... there are three types of driveway sealers. Asphalt emulsion: The most common ...