disolving epoxy?

[mtronic]

Does anyone know if there is a solvent for epoxy? I managed to get some in the back of a valve stem
Thanks

[fatcat]

hydrochloric acid (sold as muriatic acid) could probably do it. It might damage the valve stem.

[mtronic]

hmm, interesting. WE have HCL acid for our pool. It may...I'll probably only need a drop or two, thanks mate.

[boilingleadbath]

Believe it or not, steel is an excellent solvent for the harder epoxies... just a quick application and it brushes right out.

...ahem... I presume you can't use a drill bit.

Which is too bad, because it means that you have to use REALLY nasty solvents... heated fuming sulfuric acid , fuming nitric acid, mixed acids, DMF, NMP... stuff like that.

All of which will destroy your valve stem in one way or another, besides being difficult and/or expensive to acquire.

[goose_man]

All of which will destroy your valve stem in one way or another, besides being difficult and/or expensive to acquire.

Not to mention dangerous.

[jackssmirkingrevenge]

Have you tried pumping it to high pressure?

[mtronic]

@ boilingleadbath: no need for the sarcasim, yes I can use a drill press. I may try that, but I think it has gone into the valve.

@jsr: yes Ive pumped it up to a 100psi and scraped at it with a nail and it leeks slowly.

I'll just give up on it, it was only a bv pneumatic made from scraps

[jackssmirkingrevenge]

I meant 300 psi+ with a shock pump

[benstern]

I would try to dremal it out.

[Hubb]

We are talking about the simple little valve stems used to fill the pneumatic cannon, right? If that is the case, just replace the stem.

[TurboSuper]

I was reading the specs on some potting epoxy and it said that acetone destroyed it after ~40 days.

Worth a shot.

[cdheller]

I'm not sure if the valve stem you are having problems with is a schrader or not but,

Auto parts stores sell a 4 way combo tool designed to tighten or loosen the valve core ,, easy out broken cores,,tap the inside threads,, tap the outer threads ..

taking out the epoxied core , chasing the threads to clean up the epoxie ,and putting in a new core and being done with it would be my plan ,your mileage may vary