Vulcanized bonding of rubber to metal is a generic phrase that covers all aspects of the process by which an elastomer is chemically bonded to a pre-coated steel surface.

Typically, the process flow consists of the insert being cleaned and degreased, drying the insert, application of a primer coat, drying time, application of the top coat, drying time, and molding of rubber over the insert.

The vulcanization of the bond occurs simultaneously with the cure of the elastomer, as bonding agents are designed specifically to react with the rubber processing conditions. Maximum bond strength is obtained under pressure in compression, injection, or transfer molds.