#1 Home Improvement Retailer

Internet #100147992

Model #30115

Store SKU #654921

$798
  • Boiler water coils, controls, valves, and vents remain clog-free
  • Conceals and repairs cracks in your water system
  • Odor-free Seal expands and contracts as per temperature
  • View More Details
Store
0 in stock
Text to Me

Frequently Bought Together

+
+
Price:
$798

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

You will need Adobe® Acrobat® Reader to view PDF documents. Download a free copy from the Adobe Web site.

Specifications

Dimensions

Product Depth (in.)
3
Product Height (in.)
9.0
Product Width (in.)
3

Details

Accessory Type
Heating
Pack Size
1
Product Weight (lb.)
2.39
Returnable
90-Day

Warranty / Certifications

Manufacturer Warranty
1 year

Questions & Answers

Typical questions asked about products:

  • Is the product durable?
  • Is the product easy to use?
  • What are the dimensions of the product?

Customer Reviews

  • 4.6
    out of 80 reviews
  • 95% recommend this product
Filter by:
Showing 1-10 of 80 reviews
Worked as advertised!
Checked my boiler to find a large puddle of water in the basement around it. Found it to be leaking on one side from under the outer covering. In taking the cover off found to have a leak made up of multiple pin leaks see pictures below. Did not want to be at the mercy of a "plumber" on a Sunday. Did my research as to my options, read the posted reviews and gave it a shot. Drained out about 5 gallons of water, added two bottles as per the instructions. Topped off the boiler water and fired it up. The spurting leak was now a fast drip that slowed as the minutes went by and the temperature and pressure increased, coming to a total stop within a half an hour. Now that I am safe from not freezing in my home, I can plan the replacement of my 20 year old boiler on "my terms"!
by
    • Recommended
    Rating provided by a verified purchaser...
    Rating provided by a verified purchaser
    by
    • Verified Purchase
    Easy to use and instantly sealed a crack in my boiler
    Easy to use and instantly sealed a crack in my boiler
    by
    • Verified Purchase
    • Recommended
    This product is good for open loop heat circulation systems I use
    This product is good for open loop heat circulation systems I use
    by
    • Verified Purchase
    • Recommended
    Rating provided by a verified purchaser...
    Rating provided by a verified purchaser
    by
    • Verified Purchase
    Worked like a charm for a leaky steam boiler!...
    Worked like a charm for a leaky steam boiler!
    by
    • Verified Purchase
    2 people found this helpful
    works great for sealing up small leaks
    works great for sealing up small leaks
    by
    • DIY
    • Verified Purchase
    • Recommended
    I used this product (two quarts) in my 400,000 BTU...
    I used this product (two quarts) in my 400,000 BTU system that includes 1600 sq ft of floor heating, 800 sq ft of snow melt outdoor heating, and a 90,000BTU Suspended Horizontal Hydronic Wall & Ceiling Unit Heater. I had no idea where the system was leaking, there were no visible leaks around the accessible equipment, but the majority of the piping is underground. All underground pipe is PEX. The product does not claim to plug leaks in plastic, but one day after running all circuits at maximum temperature, the leak stopped. We had our first snowfall yesterday so all circuits were in use with no loss of antifreeze solution. Great Product!
    by
    • Verified Purchase
    This product really works.
    Had a residential Crown Steam boiler with a crack in it. Unit will fill with water but once it started to make sream, the water starts pouring out so much that it put the burmer flame out. I poured this boiler liquid in and fired it up. I had to adjust the flame level with the shut off valve so that it would not put out flame. What i did do in addition to the instuctions was i caught the water that was comming out through the crack and kept reusing the old water. Thats how bad it was leaking. I did not want to keep making more trips to Home Depot and keep buying more boiler liquid. After about 4 hours of this the boiler stopped leaking and been using boiler ever since. This stuff is great. Saved me from having to buy a new boiler.
    by
      • Recommended
      1 person found this helpful
      Easy to use and very effective...
      Easy to use and very effective
      by
      • Verified Purchase
      Showing 1-10 of 80 reviews