The adhesive is stronger than I expected. Before I installed any I did a test run on a warehouse floor without doing any cleaning or preperation about two years ago and it hasn't bugged at all. They are made from PVC and you can get the diamond tread instead of the slick vct surface. I really...
If you liked tiles for insulation but need something stronger, you might consider NORSK-Stor tiles. They're made from PVC instead of the rigid plastic so they would probably hold up better with your floor jacks.
Might check out NORSK-Stor tiles http://www.garage-flooring.com. They are made from PVC instead of rigid plastic so they are super dense. That would solve both your look and performance issues.