What is the difference between single release and multiple release (durable) Inside Tire Paints?

A single release inside tire paint is applied to the inside of each tire prior to it being cured. A durable inside tire paint is applied to the inside of one tire prior to it being cured; the film is designed to transfer from the treated tire to the surface of the curing bladder during its curing cycle. The transferred film forms a layer on the bladder that has sufficient slip and release to permit the curing of several tires before the film requires replenishment via the curing of another coated tire.