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wort and wash are similar, mash is different. Mash is the precursor to wort/wash.
There is some methanol present in all fermentations. It comes out first because it boils at a lower temp than ethanol. This is why moonshiners throw away the first runnings. In general, there are few food-grade epoxies so some specificity would help here, using LocTite could poison someone.Moreover, you can reduce the amount of fusel alcohols present by fermenting at a low temperature. Knowing the behavior of the yeast can do wonders for the flavor of any alcohol product. Stress a yeast with too-high a temperature and they produce fusel-alcohols.