5 Gallon Lid Gasket?

[Blammo]

I'd like to run some larger scale merucry amalgam reductions, and the thing is I need and overhead stirrer. Obviously, methanol fumes are an issue, and could ignite.



In order to prevent that, I want to design a lid that does not leak vapors, or as little as possible.



I'd probably rigup a sort of stand, then attach a drill to it, with a paint stirring head, and use that to stir.



I need help designing a sort of gasket that can prevent as mucb fumes as possible, and won't get destroyed over a few hours of stirring.



Can anyone help with this?

 

[HIGGS BOSSON]

You need to assemble something similar to a chemical reactor from household products, preferably with a jacket and a condenser.
The vapors from the reaction mass must exit through a cooled condenser.
Perhaps it is still easier to buy a ready-made reactor.
And if you make it from plastic, then the yields will be smaller.