Powerful stop leak for steam and hydronic systems. Will stop steam boiler surging. Doesn’t coat your controls, valves, vents or submerged coils. Forms a tough seal that expands with heat and is resistant to pressure. Does not foam. Contains no petroleum distillates, therefore it is safe with your plastic or rubber components. Compatible with other treatments, including glycol.

Packaged in 1 QT bottle. Use 1 qt per 400 sq ft of radiation. Use larger amounts for larger leaks.