Profile: MJC, Inc. offers HVAC/R coatings and modifications. We specialize in anti-corrosive, anti-microbial, and architectural coatings. Our Blygold® coil coatings have a wider chemical resistance list, better heat transfer and inherent UV resistance. We also build and refurbish packaged skid systems for portable, temporary and rental fleets with electrical quick connects & round duct connections.