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Main product image of 1 lb. Boiler Solder (Powdered Stop Leak)
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1 lb. Boiler Solder (Powdered Stop Leak)
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$13.03 each
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In Stock
Get 13 Thu, Jul 24
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Product Highlights

Product Highlight: Color
Gray
Product Highlight: Volume
16 oz.

Description

Powdered stop-leak quickly finds and seals trouble spots on cracked steam or hot water heating boilers. Forms a tough seal that expands and contracts with boiler metal. Resists high pressure and temperature. Once set, seal will not be dislodged by boiler cleaners. No odors. Petroleum-free. Will not clog system, valves and vents or interfere with normal boiler operation. Will not harm rubber or plastic parts. Compatible with Hercules cryo-tek or other types of propylene glycol based anti-freeze products, chemical additives and boiler treatment compounds.

Specs

Product Type:

Solder

Application:

Leak Prevention

Color:

Gray

Volume:

16 oz.

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Product Reviews

4.55 out of 44 reviews
91% would recommend this product
4.55
out of 44 Reviews
91% would recommend this product
WRITE A REVIEW
5 star
82%
4 star
7%
3 star
2%
2 star
2%
1 star
7%
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Most Liked Positive Review

BOILER SOLDER FIXED OUR LEAKY FURNACE!

Our last outdoor furnace was installed in January 1999, a HEATMOR. A furnace with an outstanding reputation. Stainless steel firebox. This furnace is not pressurized as some are. It holds 90 gallons of water and the first few years we added a few gallons of water every 3 or 4 weeks. But, after throwing big heavy chunks of wood into the firebox for several years it started taking more and more water to keep it up to the desired operating level. I imagine I cracked a weld by being a little forceful as I threw in the wood chunks. I'll take the blame. This became a big concern and we examined all the pipes and plumbing to no avail. It got so bad the last couple of years that we would have to open the valve and add at least two minutes worth of water (probably 8 to 10 gallons) EVEERY 2 DAYS! I started researching products on the internet and came across this one called "Boiler Solder." Being desperate, I ordered 3 lbs. and within 3 days we received the box and immediately read the directions and mixed the product with hot water and introduced it into the furnace. This furnace is in a shed on a cement floor, with an entire winter's supply of wood. We never noticed a puddle on the floor around the furnace, but obviously it was leaking as the ashes began to get wetter and wetter. It has been 3 weeks tomorrow since I added water and the gauge still registers in the safe operating level. Thank you HERCULES for developing a product to stop serious leaks in heating systems. TRULY A MIRICLE!
VS

Most Liked Negative Review

I wouldn't try it unless you're absolutely desperate

Putting this product into a steam boiler will not only create the worst foaming overcarry you've ever experienced, but will also prime the system. If you do get the product to steam without priming, you will get a very strong burning-oatmeal smell out the vents. Purging the product from the system (as well as the outgoing/return pipes) is going to take a very, very long time involving (in my case) back flushing every return line at the radiator and open a 2" port on the side of the boiler and wand-flushing the internals of the boiler out. If you have a customer that decided to put it in w/o consulting you first..I would say 'no bid' on repairing the situation that unfolds. Again, the solution being either replacement of the boiler (or extreme cleaning) as well as flushing the return lines of loose product. Again, extremely time-consuming and can be messy beyond belief.
Showing 1-10 of 44 reviews

Would buy again

I bought this to see if it would stop a leak in the firebox of my Mahoning Outdoor Furnace model 200. I used 1 container and within 12 hours the leak significantly slowed down and within 24 hours, it completely stopped. I added tthis to my furnace about 2 weeks ago and have not had anymore leaks. The furnace is running perfectly fine now and I'm very pleased with the results.
LMtn3794
Pennsylvania
3 months ago
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Would buy again

Had tankless plate leaking and added boiler solder and stopped leak.
Esterbrook
Boston
3 months ago
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Wouldn't buy again

Put it in and it's been 2 weeks still no change in leakage
Morris
York pa
9 months ago
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NO

THIS STUFF STOPPED UP MY WHOLE SYSTEM . I have spent close to $400.00 on filters and still have that crap still stopping up my clean out screens filters, I have flushed out the stove many times still and it continues to gum up my lines..
FRUSTRATED
COOL RIDGE WV.
2 years ago
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I would buy this product again

Works great
Northeast Construction
NY
2 years ago
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It Works

It works
GeorgeM
Centerport, NY
2 years ago
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Stopped leak in ancient boiler in minutes.

Pumped it in through boiler drain line.Stopped the leak in minutes.Huge sigh of relief.Now looking at new boilers.😂
Kenski
Upstate NY
2 years ago
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I will keep Boiler Solder on hand.

Worked in minutes to seal a leak in an older outdoor hot water wood stove. Enabled me to keep heating the Greenhouse without having to shut down for repair.
Farmer Bob
Eastern Panhandle of WV
2 years ago
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For us this product really worked!

We have 2 outdoor water furnaces. On one this product stopped steady drips in a seam in the smoke box fairly quickly. On the other water furnace it took longer, but seems to be working. Its leaks were in a different area. These were Taylor T-1000's with a large capacity of water. First one took 2 lbs. Second took 4 lbs. For us this is well worth the cost!
George
Northville NY USA
2 years ago
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I would not buy this product again

I tried to use it to fix my wood broilers crack on the inside. It never hardened enough to work.
Dan
Milaca mn
3 years ago
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Product Q&A

4 Questions
4 Questions
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Q: How many gallons does a 1 lb. container treat ?

Asked by Gator 10 years ago

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Verified Author and ReplyVerified Reply- Supply House Staff

This treats approximately 15-20 gallons.

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Q: How do I introduce it into my hot water heating system ?

Asked by sjim 11 years ago

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I have not actually used it yet since the leaks finally stopped, but I would have introduced it into the system by dissolving it in some of the antifreeze solution in a separate container, attached a hose and pump to the inlet (with valve closed), completed a loop from another valved outlet opening into the system, open both valves and pump the fluid and boiler solder into the system, close the outlet valve and let the pump build up pressure to your desired pressure, close the inlet valve. I have a hydronic boiler system, not a steam system. I was about to use this because we had a bunch of leaks in the pipes near the boiler. A plumber who works on hydronic systems can help you.

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Get the water hot that is already in the system. Pour some out in a bucket and mix the boiler solder in there, it will look like it will turn into a shiny liquid( like liquid metal). Quickly use a transfer pump and pump the mixture back into the boiler. It only works good if you use the water the is already hot > 150 deg/F.

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Q: could it help stop a very small leak in the pex itself?

Asked by leaky 12 years ago

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I had some leaks around pipe fittings in the hydronic system and this product does work for that. I have never had a leak in the pex line itself and would think that is unlikely unless you drive a nail into it or something like that. I would not depend on this product to seal an acutal break in the pex line itself. Best to replace the leaking line.

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Q: can this product be used in a pex infloor hot water heating system that has a pin hole leak?

Asked by 14 years ago

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Verified Author and ReplyVerified Reply- PexSupply Staff

Yes, Boiler Solder can be used in PEX tubing.

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