100-Series open top potting boxes provide maximum protection against shock, chemicals, moisture and temperature.
20-5745 - Encapsulating Epoxy Clear Liquid 12 OZ
Clear epoxy is useful for protecting sensitive electronic components from impact, shock, vibration, heat, conductivity, moisture and chemicals. Clear color allows visual inspection.
20-5755 - High Temperature Encapsulating and Potting Epoxy Compound - 11.5oz
832HT high temp epoxy useful for encapsulating and potting electronics in high temperature environments, aggressive chemical environments, or where improved technology protection is desired. Bonds to a wide variety of substrates, including metals, glass, ceramic...
I have used MCM for many years and would give high recommendation for getting the job done right.