Hi guys,
I would like to design a waterproof (or at least splash proof) cylinder enclosure. The enclosure should be easily removed when needed. Now I already have enclosure (a piece of circular acrylic) and a cylinder aluminum. Both have same diameter. My questions are:

1. How to make it waterproof/splash proof?
2. Any suitable removable lock design I can use to attached the two pieces?
or commercially available is acceptable.

Please give advised. Thank you.

 

Following can be options
1. There are rubber O rings available in the market. Many companies make customised O rings as per the size of the client.
2. You can give undercut in one of the cylinders and protrude the edges for the other cylinder. Give a bit of taper to get press-fit. Any fabricator or a lathe operator can be able to do so.
Hope my replies are OK with you.
In case of any query please let me know.
Regards,
Ankur Banthia