For more than 50 years, Masters Company, Inc. has been a custom chemical blender adhering to ISO-9001 quality assurance guidelines. Our state of the art facility allows MCI to continually test, evaluate, and develop new products to offer to the water treatment industry. As the demands of the water treatment industry evolve, we strive to meet and exceed the new challenges faced by the industry. Our goal is to provide custom blended and private labeled quality products at affordable prices. All MCI products are in compliance with the Global Harmonizing System of Classification.