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What is this compound on these threads?
Posted: Thu Jan 16, 2014 7:27 pm
by U1timateWaff1e
I bought this check valve online a few days ago and the threads had this red pre-applied goop on the threads. I asked the seller what it is but they haven't replied, so I'm assuming that they don't know.
My guess is that it is some kind of thread sealant? It is hardened but the mating threads can still cut through it.
Thanks!
Re: What is this compound on these threads?
Posted: Thu Jan 16, 2014 7:37 pm
by jackssmirkingrevenge
Yup, thread sealant.
Re: What is this compound on these threads?
Posted: Thu Jan 16, 2014 7:53 pm
by U1timateWaff1e
jackssmirkingrevenge wrote:Yup, thread sealant.
Can you tell what kind of thread sealant? Also why isn't it on both sides?
Re: What is this compound on these threads?
Posted: Thu Jan 16, 2014 8:29 pm
by jackssmirkingrevenge
No idea, usually they put them on all made threads, for example:
http://www.parker.com/portal/site/PARKE ... LANT&Wtky=
Re: What is this compound on these threads?
Posted: Thu Jan 16, 2014 9:33 pm
by POLAND_SPUD
interesting.... I wonder if it's possible to replicate it using commonly available materials?
like a very thin film of hot glue or something
Re: What is this compound on these threads?
Posted: Thu Jan 16, 2014 9:49 pm
by jackssmirkingrevenge
http://www.permatex.com/products-2/prod ... d-sealants
There are tons of products out there. I just use Araldite

of course it's only good for permanent joins, as are these sealants.
Re: What is this compound on these threads?
Posted: Thu Jan 16, 2014 10:32 pm
by U1timateWaff1e
Wait so is the sealant that came on my threads permanent? As in if I thread it into a female portion those two will be permanently fused? It would be very interesting to me if it somehow activates only when threads cut into it.
Re: What is this compound on these threads?
Posted: Thu Jan 16, 2014 11:06 pm
by Ragnarok
U1timateWaff1e wrote:As in if I thread it into a female portion those two will be permanently fused?
No. It's permanent in that it's "make once" - it won't seal a joint that's repeatedly assembled and disassembled.
Re: What is this compound on these threads?
Posted: Fri Jan 17, 2014 12:25 am
by U1timateWaff1e
Ragnarok wrote:U1timateWaff1e wrote:As in if I thread it into a female portion those two will be permanently fused?
No. It's permanent in that it's "make once" - it won't seal a joint that's repeatedly assembled and disassembled.
Ahh I see. So if I were to assemble and then disassemble the joint what should I do to reseal it? Can I still add teflon tape or more pipe sealant over it?
Re: What is this compound on these threads?
Posted: Fri Jan 17, 2014 6:10 am
by PeteS
U1timateWaff1e wrote:Ragnarok wrote:U1timateWaff1e wrote:As in if I thread it into a female portion those two will be permanently fused?
No. It's permanent in that it's "make once" - it won't seal a joint that's repeatedly assembled and disassembled.
Ahh I see. So if I were to assemble and then disassemble the joint what should I do to reseal it? Can I still add teflon tape or more pipe sealant over it?
Not sure what is proper, I wire brush it off and add teflon tape or or paste, but I typically clean off and redo any sealers.