Hercules, qt, boiler liquid, seals & repairs cracks & leaks in steam & hot water systems, liquid formula will not clog hot water coils, controls, valves, or vents, forms a tough seal that expands & contracts with heat, no odors, no priming, no foaming, does not contain petroleum distillates.
- Makes a strong, lasting repair on difficult leaks in steam boilers
- Prevents steam boiler surging
- Larger 1 gal size
- Will not clog or coat submerged hot water heating coils, controls, vents or valves
- Resists high pressure and is not affected by boiler cleaners
- Will not cause priming or foaming
- Contains no petroleum distillates and is safe to use in boilers and systems with plastic or rubber components