I have a second goal for this project, that I haven't talked about before. I wasn't planning on it, but I've hit a point where I need info that isn't easily googleable.

I want to sell build plates with a magnetic surface already applied. There are a number of benefits to this, but this post isn't about selling the idea, it's about some options for how to get there.

The Voron 0.1 sourcing guide points to this McMaster Carr listing: https://www.mcmaster.com/7301t21/

It's 9" by 12" and 1/16" thick. The size is far more than needed. The thickness might be relevant. The listing also lists the adhesive as Acrylic.

For practical reasons I'd like to get a very large sheet of this flexible magnet. McMaster Carr doesn't have big sheets unless you go to a Rubber adhesive. From googling, Rubber isn't AS good as Acrylic at surviving temperature. But both have the same listed max temperature. I don't know if Rubber would be Good Enough.

I can also find flexible magnetic sheets without adhesive. The price isn't MUCH better. In theory I could apply my own Acrylic adhesive, but that adds to the setup time. Testing these things all myself would take a decent amount of both cost and time (I'd want to do tests over a long period of time for validity). Ideally, someone with some knowledge of this field could tell me if it's a complete waste of time even looking at Rubber adhesive for adhering a magnet to a 3d printer build plate.