I need to seal up the fitting for my meth pump that is installed into the windshield washer fluid tank. I have tried RTV silicone, regular silicone, and JB Weld and they all start leaking after a couple weeks. Is there any type of sealant that is methanol compatible and won't degrade? I'm running 100% undiluted methanol.

 

JB didn't hold?? You sure you used it correctly? lmao, holy crap. What about MarineTex or AVTex...I used to use MarineTex under water, it held to anything. http://www.marinetex.com/
AVTex is similar

 

I used "Amazing Goop" for the same application. Haven't had ANY issues. I chose this stuff because it bonds just about anything and also remains flexible so it bends, not cracks, when needed.

Link ---> http://www.amazinggoop.com/amazinggoop/index.html

 

Thanks guys, I'll look into all of those.

 

Bill, the JB Weld was rubbery and crumbled very easily when I pulled the fitting out of the tank. So much for hard as steel!

 

i got some of that amazin goop..holy **** thats some tuff stuff

 

For my previous water/meth setup, I had a small 2 qt tank that I put a fitting in and used the "amazing goop" stuff. It never leaked, I even had 100% meth in it sometimes.

 

Where do you find the Amazing Goop? Sounds like some amazing goop, lol.

 

Home Depot has it. Lowes probably has it too. I used the plumbing one.

 

That line is priceless!

Yea, I bought mine in HD, plumbing isle.