Skyrol® SR53 is an untreated, rough-surface, milky white and hazy polyester film. SR53 has excellent mechanical and dielectric strength, durability, dimensional stability, low water absorption, and good resistance to most chemicals. SR53 retains these properties over a wide range of temperature and humidity. SR53 film is UL Flammability Rated at VTM-2 and is particularly good for motor film.