RectorSeal?

kuribo said:

I have heard that RectorSeal makes great thread sealing compounds. Which of their products would those in the know recommend for a wood boiler/pex/pressurized storage application?

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So being a pipe fitter by trade for the the last 20 yrs. i have used quite a few different thread sealants by a lot of different manufacturers. RectorSeal makes a decent product with a lot of different variations.
My personal preference for a favorite thread sealant would be gasolia soft-set. I believe it is made by Hercules (white can with blue label).
Sure others will chime in with different opinions, just my 2 cents.

I used rectorseal #5 on a whole lot of black iron in my boiler system. It is a closed pressure system.

There were no leak problems if the threads were sound. Some threads that were less than perfect still seal great.

I also use it on galvanized domestic water pipe, mostly for livestock, and fuel fittings.

Works great.

I'm a plumbing contractor, #5 is all grandpa used, all dad used, and all we currently use. If it ain't broke, don't fix it.

I used Rectorseal #5 on my black iron install with pressurized storage, to include brass and copper fittings on the overheat zone and DHW retrofit. I am a rank amateur at black iron piping, but managed to cut and thread 150 feet of black iron pipe. I stuck with mostly American made fittings, Wards brand, from Supply House, formerly Pex Supply.

Amazingly none of the threaded fittings leaked with the use of Rectorseal #5, which is a testament to how good it is. Only problems I had were with some unions needing to be cranked hard to seat. I did have to throw away four defective brass unions from Thailand which I bought when Pex Supply was out of the Wards product. Good luck with your install.

Mike

First time regular Rectorseal. Apparently didn't like heat and had leaks. Second time Blue Rectorseal, all good. Fortunately didn't have storage for the redo.No idea difference between Blue and #5.

I use #5, and the blue monster thread tape. I usually am working with antifreeze, so it's tape and dope for me.

Funny Karl, I used both also. Didn't confess figuring pros would say waste of time. Blue Rectorseal and thick teflon tape, no leaks.

Tennman said:

Funny Karl, I used both also. Didn't confess figuring pros would say waste of time. Blue Rectorseal and thick teflon tape, no leaks.

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yeah, antifreeze is slippery stuff, and at 200F and 40 PSI, it likes to sneak thru fittings. I solder everything I can, and the added time to Tape and dope a few threaded fittings, versus taking apart leakers, or having my work look like crap in 5 years (with blue green crud on my fittings), it's a no brainer.

Permatex black thread sealant.
http://www.permatex.com/products-2/...sealants/permatex--pipe-joint-compound-detail