Tack Coat Weather Requirements

Weather and temperature limitations. The curing of bond coat depends upon the weather. 

1. Bond coat should not be applied unless the air temperature in the shade and the pavement temperature are 10°C (50°F) and rising
2. Warm to hot weather is best.  Higher temperatures help bond coat material cure faster.
3. Dry air is better.  Humidity and moisture in the form of condinsation will slow cure rate.
4. No rain in 48 hours.  Rain can cause material to run into waterways.  

Generally, if you can pave, you can put down tack coat. Often follow the same parameters of HMA

• 50°F and falling air temperature.  
• Rain in forcast in next 48 hours
• Freezing temperatutes in next 48 hours