Which rigid mat under washing machine, under vinyl flooring

[Draughtsman]

1st floor galley kitchen with vinyl flooring. Kitchen is not 'fitted'.

I'd like to put some sort of fairly rigid mat under the washing machine to prevent the point loaded washing machine feet from damaging the click vinyl as the machine tries to go walkabout.

I read that rubber mats, or petrochemical based objects/non slip matting/chair leg ferrules etc generally produce a chemical reaction with the vinyl that permanently discolours!

So, what can I use that's fairly rigid that will also provide some grip. Is cork tough enough? What else might be used that's not too industrial looking?

 

[foxhole]

If the machine is level it should not vibrate enough the damage floor.If the flooring can be damaged by a washing machine standing on it then it’s unsuitable for the kitchen .