Started boiler again after 3 years, when I quit it was leaking three gallons plus a day. Its a Empire Elite, company long gone, was told don't try patching you won't get ahead of the leaks. I did some research and found Hurcules Boiler liquid I was pretty skeptical and have had the gallon sitting there for over a year. Well I decided to try the boiler again filled it up water dripping out of it put in the liquid like instructions, It worked leak stopped has leaked any more. Hope it lasts. I was very pleasantly surprised. Jim