I found some cheap clear 1" heat shrink on ebay. Interestingly even though my cicuit board is 1" square, it fits in 1" wide heat shrink. 

Trying to allow the battery to still be changed, after being encased in heat shrink, i found a cr2032 holder that allowed the battery to be slid in. My plan then was to have one opening on the heat shrink aligned with the cr2032 holder. Then the other opening would just seal up.

In order to allow the cr2032 to slide in and out I needed the heat shrink to not shrink as much as it could on that end. I ended up making a cardboard spacer that I stuck in the cr2032 holder to keep the heat shrink from shrinking too much.

I cut a piece of heat shrink slightly longer than the board and slid my circuit board into it. I then slid the cardboard spacer into it. Using my trusty harbor freight heat gun it heated it up and made sure to keep cr2032 side fairly loose while letting everything else get tight.

After it cooled off gave it a spin with the battery inserted and it worked! All in all I'm happy with how it turned out. And the cost for the case is super cheap!