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| Non hardening sealant to 400psi |
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| picclock:
I think the subject says most of it. I am trying to get hold of a non hardening thread sealant that will be good for up to 400 psi and resistant to oils and petrochemicals. Only used at temperatures up to 50C tops. At the moment I use Rocol foliac threadseal XS, which works well but you have to wait at least an hour after assembly to test, then if there is a problem another hour etc. So I'm trying to speed things up and make disassembly easier. I'm in the UK so although I'm pretty sure such stuff exists in the states, I haven't had a lot of luck finding something suitable over here. Many thanks for your time Best Regards picclock |
| Lew_Merrick_PE:
Picclock, ND Industries (US) makes a product called Vibra-Tite. It comes in two forms: solvent vehicle and water vehicle. The water vehicle version works quite well in firearm gasnut applications (i.e. up into the 1400 psi & 370°C range) and is used extensively in racing engine applications. The recommended application is as a patch (like a nylock insert), but I have used it in dip to cover xx% of threads to 100% coverage applications. Normal (i.e. non-rushed) cure is 24 hours at room temperature. Rushed cure (not recommended, but it works) involves heating the entire fastener to 100°C until the water evaporates. I am not sure what pertrochemicals it is fully resistant to in practice. Normal machine oils & greases have never caused a problem in my experience. I doubt that it would survive anything that causes urethane to degrade. I have used it several times when dealing with gasnuts in firearms. McCann Industries (now in hiatus after the death of the owner) used it in a number of custom firearms used by Special Operations troops since 1996. The adjustment screw in these gets relocated according to the user's preference and load of ammunition used -- call it twice a month on average. As of late-2010, there were no failures in any of the firearms. Does this help? |
| John Rudd:
Picco....Isnt PTFE any good? I work in the gas industry where we have pressures over 3500 psi, we use various sealants Liquid PTFE, BossWhite and hemp.... I'll see what else we use... |
| Stilldrillin:
I use Blue Hylomar. So, I can dismantle easily, when necessary. Works for me! :thumbup: David D |
| chipenter:
I use Stag type B red for instant seal up to 650 C . |
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