Graymills Aquatene Cleaning Fluid for Heated Systems Only, 4-1/2 lb.

Spreads easy, drys quick with minimal shrinkage
Non-flammable - biodegradable
Concentrated alkaline cleaning fluid; mix 1 part cleaner with 4 to 9 parts water
Use at room temperature or heated up to 180°F
Removes grease, dirt and oil from most metals
California compliant; approved by South Coast Air Quality Management District
5 gallon can