Product Features Include: Original Silver King "SQUICK" is scientifically formulated to clean and protect steam boilers by a patented absorption/precipitation process; SQUICK prevents formulation of insulating scale, protects metal and prevents priming or surging; Patented "squick" maximizes efficiency and prolongs the useful life of the boiler; Absorbs grease oil, rust, dissolved and suspended solids; Prevents formation of insulating scale and crystallizing solids; Prevents corrosion - protects metal surfaces; Neutralizes free oxygen; Prevents foaming, surging or priming; Maximizes heat transfer; Safe to use in all boilers - contains no petroleum or hazardous components; No draining, no blow down required (precipitated sludge may be drawn off); With anti-foam silicone SK-24; For each 150,000 BTU's of boiler rating