Berridge Manufacturing Company offers premium, fluoropolymer coated Galvalume® coil material in 24 & 22 Gauge painted with full-strength Kynar 500®/Hylar 5000® resins. Kynar 500®/Hylar 5000® afford maximum exterior durability due to outstanding resistance to ultraviolet radiation. (See chart of Berridges SRI Values.)Coated Coils and Units - getExplosionProofJun 06, 2019 · When you coat coils with additional material, it inhibits a coils ability to transfer heat. Heat loss from coatings can easily be accounted for when designing a system, but when retrofitting, a coated coil might not perform to its manufactured specification. Generally speaking, the thinner the coating, the better the heat transfer is going to be.