Technical Epoxy That Gasoline Wont Dissolve - Is There Such a Thing

Looking to see if anybody has come across an epoxy that wont break down and dissolve for long term useage.

Dont really want to use JB Weld for sealing a carburator but probably will have to consider it also.

Any suggestions ?

Oldmics

 

Not much will hold up to gasoline long term, JB-Weld is good stuff, but it won't last very long. If there is something that works, it's probably banned or hard to source. I've used cyanoacrylate aka superglue to seal the gasket to powervalves.

 

Belzona is what we use in the plants.

 

I know it is available in the aviation world, but can't provide a brand or part nr, sorry.

 

Seal-All
I've used it on derby cars a bunch of times. It is gas proof.

 

Are you talking about 1422 sealant with the 776 topcoat?? works with JetA

 

Caswell makes an epoxy gas tank sealer. I used it on a car 10 years ago and it is still standing up.

Seal All works, I used it years ago. There are brands of epoxy putty made for fixing leaks in gas tanks, I think Loctite makes one but there are others. Any auto parts store should have them.

 

X2. Also used it on derby cars


Sent from my iPhone using H.A.M.B.

 

Only thing I ever saw that was specific to gasoline resistance was a product called 'Kopeltite'. It was used on the heavy cruiser U.S. Los Angeles, for gasoline fittings.
Friend brought a bottle off the ship when he was discharged, 1961.
Best gasoline fitting sealant I've ever used.
Due to availability, I'll go X3 on the SealAll.

 

That Caswell Rusty mentions is the stuff, but you gotta buy $50 worth of it. If not more. And that seal all works on fittings, etc., where nothing else will.

 

Had a hole in a gas tank once in the middle of no where. The old guy at the gas station told me to chew up a tootsie roll and stick it in the hole. Held for years. Haven't ate a tootsie roll since.

 

I wouldn’t eat it either. Especially after it’s been on the bottom of a gas tank for years.

 

I had a hole in the swap meet gas tank I picked up for my old Deuce pickup, I tried JB Weld and it wrked for a while but the gas started leaking again within a few weeks, I wouldn't suggest it. HRP

 

You ain't right. HRP

 

I had same problem in my 55.. couple of old farmers at the station told me to rub a bar of ivory soap across the leak . It sealed it up and never leaked again .Drove it another 3-4 yrs before I sold it. Always kept a bar in my tool box ...

 

Kopeltite and Belzona were used in every power plant I ever worked. Belzona could be applied under water...salt water included.

 

Gasoline won't touch my stuff

 

I've heard bar soap will seal smaller holes, never tried it though.

 

I always used regular slow dry epoxy to seal the well plugs on the bottom of Quadrajets that are so prone to leaking. I never had any issue with gasoline softening it. I usually heat-cured it for an hour or so with a heat lamp to speed up drying.

The local fire department carried epoxy ribbon with them on their trucks to seal leaking gas tanks at accident scenes.

 

May be he's not Right, but sure made me chuckle!

 

Yes also on the bar of Ivory soap! Always on threads, pipe or male/inverted.
Used it on my 4 jugger 304" flathead.
Bonus: Cleanest carbs in town...

 

Marine tex

 

If your talking parting surfaces HYLOMAR, my first use was used for component surfaces on the Rolls-Royce rb211 the Lockheed L-1011 powerplant. They didn’t use gaskets. If for a crack good luck.

 

There's a big difference between gasoline " proof" and gasoline " resistant" , and there's a difference between " exposed " to and " immersed " in...

 

For cheap stuff, JB Weld works fine. I used it on a carburetor fuel line fitting that the threads were eaten away. No leaks for 3 years, then changed engines.
Actually better than their gas tank repair material.

If you want a real sealer -
A-788 Splash Zone Compound.
The pro engine builders use this for repairing filling heads and intake manifolds. I've used it for fixing intake manifolds that were altered to work on a different engine that they were originally designed for.
Not cheap, works great with gas and alcohol..!

Mike

 

This stuff is expensive but it will absolutely hold up in gasoline. I knew race teams that repaired fuel cells with it and I used it to put dams in the float bowls of Weber carbs. The gasoline never broke it down. Did I mention it is expensive?
https://www.amazon.com/DOW-Corning-...w+corning+730&qid=1563240945&s=gateway&sr=8-1

 

JB Weld has a specific product that is supposed to be gas proof/resistant

 

JB Weld is in 2 of my intake manifolds and have all kinds of fuel in them with nothing ever happening..

 

My experience is if it can stand full immersion in gas, the mechanical strength is lacking so trying to fix a broken internal part is an exercise in futility. Most will work as a sealer as long as the whole joint isn't fully immersed.

 

Every Quadra jet carb I overhauled I coated the main jet wells on the bottom side with j-b weld and had no problems with it being dissolved with the gas