Samsung Ecobubble terminal leak?

This is usually caused by a metal object like a coin or screw that gets under the drum and is punched through during spin. I would say it would be extremely difficult to repair.

To repair it you would need to use some epoxy resin that has two strips of plasticine-type halves that you mix together and press into and around the hole. But it can be difficult to ensure that it sticks properly to the plastic drum. You would need to properly roughen it up.

Ideally I would try to fix it from inside and then on the outside but you can’t even strip many drums down now, and if you did you would need to replace internal seals - and it’s a very big job.