Penimaster vacuum cap rubber is all stretched after started using silicon sleeve! HELP!

So I’m using Penimaster Pro and after recent changes I started adding a silicon cap on glans to prevent edema and hurting of glans.


The vacuum chamber is build with two rubbers, one around chamber and second around plastic circle connecting with chamber.

Problem is - for some weird reason the silicon sleeve when sucked in the chamber stretches out the Penimaster pro vacuum chamber rubber extremely.

How to fix this? The rubber opening became 2x wider and it is all stretched out.

And why is this happening? How do other Penimaster pro users deal with this? I assume you use silicon sleeve for glans to protect them? So you must be getting the same issue?

Any help would be appreciated.

I'm uncut

I followed this guide btw:

There’s not a huge amount of Penimaster pro users here but I hope you find someone that can help you. I think @Lightning discontinued the PMP, I will check to make sure. You also may have some video to help in the video section.