Equiviscous temperature (EVT) for asphalt

The recommended EVT for roofing asphalt (ASTM D312, Type I, II, III or IV) is as follows:
mop application: the temperature at which the asphaltÕs apparent viscosity is 125 centipoise.

Mechanical spreader application: The temperature at which the asphalt’s apparent viscosity is 75 centipoise. Note: To avoid the use of two kettles if there are simultaneous mop and mechanical spreader applications, the EVT for mechanical spreader application can be used for both application techniques.

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