Model # 30115

Internet #100147992

Store SKU #654921

null 1 qt. Boiler Liquid

1 qt. Boiler Liquid

$8.54 /each

Frequently Bought Together

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

Info & Guides

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Warranty / Certifications

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Customer Questions & Answers

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

Asked by: Roe
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.
Answered by: monkey
Date published: 2016-10-08

long term or short term

how long will sealer last before my boiler leaks again
Asked by: irish
no issues 1 year later
Answered by: NorthEastOhio
Date published: 2015-12-05

how many Quarts to treat 300 gallon outdoor furnace

Asked by: Donnie
I used 2
Answered by: NorthEastOhio
Date published: 2015-12-05

Where do u put it in?

Asked by: Miikeyd
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Customer Reviews

1 qt. Boiler Liquid is rated 4.6 out of 5 by 18.
Rated 5 out of 5 by from I had a leaky boiler, and I was told it... I had a leaky boiler, and I was told it needed to be replaced. I found this product by chance in home depot. It sealed the boiler in 5 hours, and in less than 12 hours the leak was fixed. I could not be happier! In all my research, I have never seen this product mentioned. It is amazing!
Date published: 2017-01-25
Rated 5 out of 5 by from Greatest thing around Had leak in boiler water leaking out called plumber he walk in door took look said I need new boiler cost $7200 service call $135 he was in the house 5 minutes did nothing. I said let me try this I have nothing to lose. Poured bottle in and no more leak!!!! WOW CANT BELIEVE IT.
Date published: 2017-01-19
Rated 1 out of 5 by from Made boiler surge! My boiler was working fine except for a small drip from one pipe. I read all the great reviews and bought yhis followed the directions, stareted boiler and it surged so bad the lwco kicked in. I dont understand how others are seeing good results???
Date published: 2017-01-02
Rated 5 out of 5 by from Fixed leak...worked awesome Fixed leak...worked awesome
Date published: 2016-11-01
Rated 5 out of 5 by from Works well. Works well.
Date published: 2017-01-10
Rated 5 out of 5 by from 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.
Date published: 2014-12-17
Rated 5 out of 5 by from Works as advertised! A week before heading out on vacation I discovered a leak in a pipe joint on my boiler. Not having enough time to get a plumber in to repair the problem I tried some plumbers putty and other temporary sealants to resolve the issue. Each of these seemed to slow the leak down, but did not completely stop the problem. With just a couple of days left I decided to give this product a try. I followed the instructions unscrewing the pressure releif valve and pouring the product into the boiler. After reinstalling the releif valve I fired up the boiler. I was stunned to see the leak completely stop within minutes. I held my breath as the boiler pressure rose as this is when the other products failed. No sign of the leak reappeared. I checked the boiler over the next two days and was happy to see that the boiler remained dry and the water level in the boiler remained intact. This is a wonderful product!
Date published: 2013-02-03
Rated 4 out of 5 by from Hercules 1 Qt. Boiler Liquid - Leak Gone Product easy to introduce into system. Continuous drip in boiler has been eliminated. No system performance problems observed due to introduction of product into heating system. Ordered two quarts and only needed to use one quart. Produect used On - Residential Hydronic Radiant Heat Boiler System 175,000 Input/135,000 Output, 21 PSI Static Pressure, 30 PSI Relief Pressure, Operating Temp. Approx. 140 degrees F. Boiler Age: Installed 1964.
Date published: 2013-11-05
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