I dipped them in melted paraffin.
Then I bought a small round waterproof container with a striking surface on the bottom and didn't need to waterproof them anymore.
Clay (WA5NMR), Lee (Wife), Katie & Kelli (cats) Salli (dog).
Fixed domicile after 1 year of snowbirding and eleven years Full Timing in a 2004 Winnebago Sightseer 35N, Workhorse chassis, Honda Accord toad