Here are some photos of chest ice freezers sealed with pond shield or linex.
There are several ways to seal an ice bath. I prefer using a pond liner so I don't have to worry about leaks. It doesn't look as nice as using pond shield paint or Linex but the waterproofing is reliable. We will update more in the future on this topic of what method is most reliable as we learn from others. Here is a cold plunge guide that will help you build one for yourself.
