Not sure what you are referring to. No one is using JB Weld to hold back water. Your just attaching the back of the element to a waterproof box so you can let the box waterproof tge connections. There's nothing wrong with this.
An electrical box is too thick to feed the element thru it and still use a weldless connection.
On Tap: Belgian Barrel Aged Barleywine, Da Yooper's Oatmeal Stout, Breakfast Stout, Hop Your Face Off IIPA, Catcher in the Rye Saison, "Wino-head" Nelsin Sauvin Gumballhead.
Bourbon Barrel Duchesse De Bourgnone
Fermenting English Mild
on Deck: Lager?