Prepare and prime your aircraft surfaces before applying an adhesive to ensure a better grip and a stronger connection. It is a top quality primer that offers an exceptional level of quality and precision that every aviator will love. Tempo brand primers are designed to be used before applying an adhesive. They work best on bare steel and aluminum, ready to glue the surface and provide a stronger grip. Tempo A-702 green zinc phosphate primer can be used before almost any type of adhesive and has a light green color to make it easy to see which surfaces have been treated.