Metal / Plastic Air Tight! HELP

[xxShaneOmac]

I have 1/4" plastic peice that I tap'd and got appx 4 threads into it.

Then screwed in the metal bolt.

This was not air tight.

Is there another way I can dothis to make it air tight?

Ive used Pipe fitting glue on plastic to plastic before.
But dont know what to do about metal / brass to plastic.

Any tips let me know thanks.

 

[talonalex92]

Teflon Tape and or paste.

 

[MrBoxx]

Or JB Weld.

 

[absolute_DSM]

You definately need teflon paste on a NPT fitting.

 

[xxShaneOmac]

What kinda paste?

And jb weld from plastic to metal / brass?

 

[xxShaneOmac]

With the soft plastic, the tape didnt work to well.

 

[doroyce05]

i was thinking about getting my 1g fuel rail tap. i was going to install a afpr and i was just going to get the fuel rail threaded and use a brass fitting from home depot. i was just going thread the fitting the connect a hose to it(while clamping it down).

will this work? and/or what should i do to make sure it doesn't leak. i dont want fuel leaking in the engine bay.

 

[xxraptor660xx]

Quiksteel works too. Similar to Jb weld.

 

[talonalex92]

Teflon paste. I wouldnt use JB weld unless its never coming back apart, but that will definatly work.