Treatment Resource Center

There are two main variations of the Prime Coat process:

Sprayed Prime Coat - Cutbacks, Prime Asphalt Emulsions, Non-Asphalt Emulsions

1. The road base is prepared according to the design specifications
2. Finish rolling is completed
3. Free dust is swept off 
4. Prime coat is applied at the rate of 0.20 gallons per yard

Mixed Prime Coat - Mixing Grade Emulsions 

1. The road base is prepared according to the design specifications
2. The upper portion of the base is lightly scarified
3. A mixing grade emulsion is applied
4. The base is rolled

Waiting Period Before Paving

Following application of the prime material and prior to application of the succeeding layer of asphalt mixture, allow the prime coat to cure and water or volatiles to evaporate.  This may take 24 hours for emulsion primes and 72 hours for cutback primes depending on site and weather conditions.