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In a message dated 12/19/00 1:27:03 PM Mountain Standard Time, [log in to unmask] writes: << I haven't heard of HFE. Can you enlighten me? >> Hi Al: I'm sure you have heard of "emulsions" - more formally known as "emulsified asphalt" - which are a combination of liquid asphalt binder, water, and an emulsifying agent. They are used for many purposes. I would refer you to the Asphalt Institute publication MS-19. A High Float Emulsion (HFE) is an asphalt emulsion that passes an additional high float test. There are many potential grades. Again, I would refer you to the MS-19 for more detailed information. All Asphalt Institute publications may be ordered over the internet at: www.asphaltinstitute.org. Best regards, Stephen R. Mueller, PE former AI District Engineer Denver, Colorado USA