O ring mold

Just for mold rough O-ring.

I use it with hot glue for now.
Fill it and cool down then take it into 70℃ hot water for easy removal.
Clogged remnants are still annoying but use 70℃ water make it easier.

Ring shape may not be accurate.
Need to cut out gap spilled outs.
I use it for tires. Still not tested for seal.