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Anyone used Permatex or J-B Weld Tankweld ?

Fuel System: Gas (Petrol) tanks, Carburators
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G-Man
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Post by G-Man » Mon Sep 17, 2018 2:40 pm

'60 C77 '60 C72 '62 C72 Dream '63 CL72
'61 CB72 '64 CB77 '65 CB160
'66 Matchless 350 '67 CL77
'67 S90 '77 CB400F

Phil-UK
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Post by Phil-UK » Sun Sep 23, 2018 4:01 am

Update -

Had a reply back from Permatex in North Carolina :-

Hi Phil. I do not recommend our kit form for this repair. It could dissolve over time and uses fiberglass strands as a backing. Our “putty” style is now safe on up to 10% ethanol gas. Part number for this is 84334.

Graham - I had seen the Masterbond mentioned on a different forum but its only available to industry buyers.
LM - you have obviously had great results from JB Weld so will see which is more readily available from here.

Phil

LOUD MOUSE
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Post by LOUD MOUSE » Sun Sep 23, 2018 7:32 am

No axe to grind here however I've never had a problem with JB on any part where there was gas in direct contact. ....................lm
l
Phil-UK wrote:Update -

Had a reply back from Permatex in North Carolina :-

Hi Phil. I do not recommend our kit form for this repair. It could dissolve over time and uses fiberglass strands as a backing. Our “putty” style is now safe on up to 10% ethanol gas. Part number for this is 84334.

Graham - I had seen the Masterbond mentioned on a different forum but its only available to industry buyers.
LM - you have obviously had great results from JB Weld so will see which is more readily available from here.

Phil

rrietman
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Location: bellingham wa.

Post by rrietman » Sun Sep 23, 2018 11:00 pm

I can say for certain from direct experience that 10% ethanol fuel will eventually go right thru JB weld. it might take a month or a year, but it will eat it up. and I am a big believer in JB weld. I have used it to repair combustion chambers on cyl heads!. but now, in 2018 with the piss that we get for fuel, we need to rethink a lot of what we do on these old machines. rubber gaskets won't work, you need viton o-rings,spark plugs don't read right, fuel tank fill caps leak.
Good luck
Randy

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