Best thread lock for air system

[The Artist]

What would anyone recommend for sealing threads air tight.

Connections are things like 3mm plate with a 1/4 BSP hole and a 1/4" BSPT fitting screwed in.

Is normal locktite air tight? PTFE tape + locktite? This is single use so not going to be undone most likely.

[Nexus Icon]

https://www.henkelna.com/us/content_data/141299_LT5557_5452SSF448695.pdf

Ignore the US site. It's a list of loctite's pneumatic sealants.
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[The Artist]

I have some 545 available so that will do then.

[Islander]

Don't be tempted to combine Loctite and PTFE tape though. PTFE is Teflon - it'll stop the Loctite from doing its job.

[janner_10]

Just PTFE is fine - The whole air system at work is sealed with it and most fittings have been there for years - we don't use any form of threadlock with it - it just isn't required.
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Yamaha FZS600 (Now gone to heaven) > CBR600F4i (SOLD) > '99 YZF-R1

[lukamon]

[Aff]

As above, If you're using a BSPT fitting, just PTFE is fine, that's what its made for.
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[Llama-Farmer]

I've just used some PTFE tape that I found in the toolbox, seems to do the job on all my compressed air stuff, no problems up to 12 bar. Three times round the male thread, wound the correct way round so that it doesn't unravel as you screw male into female.

I did replace the "quick release" (chinese monkey metal non-standard fitting) connectors on my compressor and separate tank for some decent PCL connectors, and got PCL connectors on all the hoses and tools so I know the connectors are all good quality and will fit each other, most of the original connectors had terrible thread lock stuff which didn't seem to help seal it, just prevent the original connectors ever being removed without rounding them off with the spanner.
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[stinkwheel]

As said, the taper thread ought to do it by itself.

PTFE tape is belt and braces.

I've fitted high and low pressure oxygen systems and we just used taper-thread brass fittings on them.
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[Ariel Badger]

It depends very much if you need to ever take it apart again, if it is permanent use cotton and araldite.
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[janner_10]

or boss and hemp if you want to be really old fashioned
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Yamaha FZS600 (Now gone to heaven) > CBR600F4i (SOLD) > '99 YZF-R1

[Rncv]

Just PTFE tape.

We use BSP fittings with PTFE tape on our HP compressors which are around 3-400Bar (4-6,000 PSI)

Make sure you put the tape on the right way
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