Features and Benefits: Activator for use with High Teck 77451 and 77453 2K Quicksand PrimersAcivator for use with High Teck 2K Quicksand urethane primer/surfacers-77451 and 77453 | Ideal for use on prepared steel, aluminum, iron, fiberglass and painted surfaces | 4:1 mix ratio | Size: half pint.