Powdered Boiler Stop-Leak

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

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

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.

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!!!

Mmm no lo se pero a mi no me funciono paraba por 2 semanas y nuevamente gotea

Very pleased

Worked great

It was a fast and easy transaction. The product did what they said it would do.