of the Standard Specifications requires that seal coats and surface treatments be placed when the air temperature is above 50°F and rising. Seal coats and surface treatments may not be applied when the air temperature is below 60°F and falling. In all cases, no seal coat or surface treatment may be applied when the surface temperature is below 60F.�

If a polymer-modified asphalt cement is used, it shall be applied when the air temperature is above 70°F and rising and not when the air temperature is below 80°F and falling. Surface temperature must not be below 70°F. When wintertime work is allowed, the Engineer will approve the air and surface temperature for the asphalt application.�

If asphalt-rubber is used, it shall be applied when the air temperature is 80°F and above, or above 70°F and rising. In all cases, do not apply seal coat when surface temperature is below 70°F.�

During the summer months, roadway temperatures are commonly 100°F or higher by 9 a.m. So in most cases, temperature is not a problem. An inspector must record the surface temperature every morning before any asphalt is shot. This can be done by placing a surface contact type of dial thermometer on the roadway. The temperature reading should be taken under conditions typical of those in which the asphalt will be shot.