Glyptal 1201 Red Insulating Paint - 1 Gallon 1201 Red Insulating Paint - 1 Gallon Can Coating for interior of hydraulic tanks, and bearing cases. Primer and finish for motor, generator, and transformer housings Adhesion. 1201 hangs on, stays where it's put-on metals, ceramic, porcelain, concrete, fibres, and wood. Prolonged Heat. After 3700 hours at 35C, there is no change in dielectric strength.