Urethane Paint Activator works with Eastwood\'s Single-Stage Urethane Paints. Add it to harden and cure our single-stage urethane paints. Mix 1 part Activator with 3 parts Single-Stage Urethane Paint 2-hour pot life at 70 degreesF This activator is for use with Eastwood\'s Single-Stage Urethane Paints. Mix 3 parts Single-Stage Urethane Paint to 1 part Activator. The entire quart may be added to the  3/4 Gallon Single-Stage Urethane Paint if spraying an entire vehicle. Pot life is 2 hours at 70 degrees F. Higher temperatures and humidity will shorten pot life significantly. 32-oz. can of Urethane Activator.