Your cart is empty.
Your cart is empty.A special blend of powders that will repair leaks in steam and hot water boilers. The repaired leaks will then resist high temperature, expansion, contraction and vibration and will give the boiler many more years of trouble free operating life.
luis jose martinez
Reviewed in the United States on May 6, 2024
Mmm no lo se pero a mi no me funciono paraba por 2 semanas y nuevamente gotea
george
Reviewed in the United States on February 6, 2024
Hardy wood boiler leaked 3 gal a day,Added your stop leak just a little a day to water till all in, No leaks at this point. Will buy again if needed. Thanks
StaMar
Reviewed in the United States on December 4, 2024
This product does what it says and more. Surpassed my expectations by far
Tj
Reviewed in the United States on December 18, 2024
Works fast
Dennis M. willett
Reviewed in the United States on February 13, 2023
I used 3 packages of the dry sealer on a Central Boiler wood stove that is 15 years old and had started leaking several gallon of water a day into the fire box. 2 weeks out and still not leaking.
Radiance
Reviewed in the United States on July 7, 2022
I will admit that I have experience in plumbing and have used many black swan products over the years, complete newb to stop leak for these, familiarize yourself with temp and pressure limits of your boiler as well as hi-lo 3 way temperature thermostat. Ive only worked on a few boiler but have a strong grasp of working theory.. This product succeeded where Hercules boiler liquid failed. Or perhaps it was a combo with some still in system while alot leaked out. One pound of black swan powder(for now untill i can repair correctly. (I decided to wait for powder version (not used blackswan liquid yet) 8k kinda hard to come up with at the moment. I have since switched careers and have no license in my state ) repaired some what I believe to be bad castings that were never claimed for warranty. (Moved into home in last year) knocking on wood I have bought some time to save for a replacement. Some TLC and proper care might bring this one back from the departed realm of boilers for some time if I am extremely lucky. Feeling kinda amazedRight now
Michael Martel
Reviewed in the United States on January 16, 2021
This product exceeded my expectations. I have an outdoor wood boiler that was leaking substantially from two places. It was consuming around 30 gallons per day. I treated the boiler with this product and within 2 hours both leaks were completely stopped. Amazing!!!
Emanuel king Jr
Reviewed in the United States on July 14, 2018
Very pleased
Recommended Products
$59.88
$ 29 .99 $29.99
$29.40
$ 12 .99 $12.99
$106.88
$ 51 .99 $51.99