I'm planning to cover up an open coil humbucker, with a cover that has no holes exposing the slugs, that looks something like this (it's simply easier to keep clean):

[![enter image description here][1]][1]


I watched [this video](https://www.youtube.com/watch?v=Hv4KI4XD1io) on the subject, as far as I understand the process explained here is:

- Create a barrier between the plastic top/slugs and the cover using wax
- Insert the pickup
- Solder on both sides of the back
- Functionally we are done

What I don't understand, is what are we trying to achieve with the wax?

- Are we trying to prevent conductance between the cover and the slugs in the pickup?
- Or are we trying to make sure the pickup doesn't rattle in the cover (budget wax potting)?

Thanks for any info!

  [1]: https://i.sstatic.net/Y4N9V.jpg