0032628301153

Model 30115

Internet #100147992

Store SKU #654921

1 qt. Boiler Liquid

$8.54 /each

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Product Overview

HERCULES 1 qt. Boiler Liquid is used to seal and repair cracks and leaks that appear in steam and hot water systems. The odor-free formula creates a tough seal that expands and contracts with heat. NSF registered and USDA authorized.

  • Seals and repairs cracks and leaks in steam and hot water systems
  • Compatible with propylene glycol-based antifreezes, chemical additives and boiler treatment compounds
  • Will not clog hot water coils, controls, valves or vents
  • Resists high pressure and is not affected by boiler cleaners

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Customer Questions & Answers

6 Questions4 Answers

Customer Questions & Answers

1 qt. Boiler Liquid
1 qt. Boiler Liquid

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My boiler is leaking. I purchased Hercules boiler liquids. Does the boiler have to be shut off when you pour it in.

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January 19, 2016
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Asked by
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January 29, 2016
Answer: 
Yes, shut the boiler off and add it directly to the boiler water tank. Then turn back on immediately and make sure the thermostats are turned up high. You want the water to be hot and circulating.
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January 25, 2016
Answer: 
Absolutely. Shut off boiler for at least one hour.
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long term or short term

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new york
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October 18, 2015
how long will sealer last before my boiler leaks again
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Answer (1)

December 4, 2015
Answer: 
no issues 1 year later
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how many Quarts to treat 300 gallon outdoor furnace

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NC
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October 6, 2015
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Answer (1)

December 4, 2015
Answer: 
I used 2
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Will this repair a hot water heater?

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May 15, 2016
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Customer Reviews

Rated 4.8 out of 5 by 13 reviewers.
Rated 5.0 out of 5.0 by Best product This is the best product we have found to stop leaks in our outdoor wood burning boiler. June 29, 2016
Rated 5.0 out of 5.0 by Worked in my hot water boiler I have a 4 unit rental property that was losing about 5psi a day (normal operating psi of 12-14) Many of the pipes ran between the floor and the foundation and were not accessible. After a plumber and my boiler guy both failed to locate the leak, the next option was to start tearing up floor boards. Before doing that I decided to give this product a try. The bottle says to add one bottle for every 400sf of heating or something like that, so I added 4 bottles; one for each apartment. Once added we turned the temp up to about 170 and set to 14 psi. The next day I came back and it was down to about 8-9 psi. I filled it to 14 again, and since then it has been holding steady. VERY glad this worked. Fixed my leak for less than 30 bucks and saved me the headache and money of locating this small leak. January 29, 2016
Rated 5.0 out of 5.0 by 2 quarts & another winter headache free My outdoor wood burner is 13 years old. Noticed a wet spot on my concrete pad, and after removing some of the outside panels, found a pinhole shooting water out. Added 2 quarts, and leak was done the next morning. I have had no issues with decreased performance in heat exchange or plugged exchangers. I did have an air "burp" that went to an automatic air vent in my system. The valve stuck open a tiny bit, leaking water, and this stuff sealed that too. I have since removed my air vents since my system pressurizes the water return, I don't need to worry about airlock. I am buying another quart to keep on the shelf- because you never have issues at 9am on a weekday. It's always at midnight on friday! -I purchased & added this LAST YEAR. No issues 1 year later. December 4, 2015
Rated 5.0 out of 5.0 by Great Stuff!!!! I had some minor leaks in my outside wood boiler so I used this product and they stopped. I put a quart in now every year before the cold season starts & I have had no leaks. Very pleased. December 8, 2015
Rated 5.0 out of 5.0 by Leaking in-floor copper tubing. I added 4 qts of this to a boiler system in a slab home, copper tubing in poured concrete. There was a pin hole leak in the floor and this seems to have worked. Was losing about 6 psi per week and now it loses less than 1 psi per week. Took a gamble to keep from breaking open the kitchen floor and it worked. November 11, 2015
Rated 5.0 out of 5.0 by good stuff works really good................................... August 5, 2015
Rated 5.0 out of 5.0 by Must have for outdoor wood burner users I confess I was lured into purchase of the cheap stainless steel ( not stainless at all) Canadian manufactured outdoor wood burner boiler. Even with keeping the required chemicals in the water at all time within three years it leaked like a sieve. Rusted in every seam. The real problem is this so called stainless steel is almost impossible to weld as compared to mild steel. This boiler was guaranteed 10 years except if it leaks then you own it. This boiler liquid has saved my boiler. Period. Whether it is the tubes inside the firebox leaking or the seam at the lower rear, this stuff works with absolutely no issues for the air to air heat exchanger or the water to water heat exchanger, the circulating pump, or the piping/valves. Better get some and keep it handy. December 17, 2014
Rated 4.0 out of 5.0 by sofarsogood easy to use took a long time but seems to be working January 27, 2015
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