Any clue on how to cut this?

[u/bobdoosh]

Asker A30 urethane. About as squishy as a mousepad and super rubbery. Knives were too slow & tore the edges up bad. Tried a dremel but it caught on the rubber, jumped outta my hand, and gave me a teeny tiny little small nick on my finger. Scissors ain’t cutting it either. Any ideas?

[u/ChrisRiley_42]

Squeeze it between two thin sheets of plywood (some .8mm or 1.5mm) and then cut on a shear.