CLR PRO MAX® Industrial Descaler Effectively dissolves and eliminates heavy buildup like scale, rust, and struvite, from a variety of industrial equipment and drains. Helps quickly restore equipment to peak condition. Dissolves & eliminates buildup like calcium, lime, rust, struvite, magnesium, and more in industrial equipment and drains. Helps to increase operational efficiency & prolong lifespan of machinery. Non-flammable, odor-free formula helps ensure a safer working environment. Use for heavy buildup in: Heat Exchangers, Evaporators, Cooling Towers, Boilers, Ball Mill Rollers, Pipes built with Struvite, any place where scale build up occurs. NSF Registered Category A3