Worthington Compressor Services Ridscale is a water-based descaler containing wetting agents, corrosion inhibitors and degreasing compounds. It is designed to penetrate and remove encrusted lime scale, corrosion, rust and dirt from water-wetted surfaces in your equipment. Ridscale is a non-toxic, non-corrosive and non-flammable solution used to remove lime scale in commercial and industrial equipment. Simple to use it changes from a yellow colored dye to a purple color when the solution is spent. Ridscale is ideal for use on any equipment where it has contact with water. Aftercoolers, intercoolers, boilers are just a few pieces of equipment ideal for Ridscale.