Stop in for a cup of coffee

The foam plate you get under your steaks from grocery store? Or is it like us and some sort of cardboard.
Body shop guy gives me this foam with plastic sheet on one side. Windshield or body parts are wrapped with it.
More flexible . Its used for packing dishes when moving but it shows up sometimes in shipping things - I just don't remember what. Before DMT, before Schumacher, some gaskets like that were pretty impossible to find precut and ready to go.
You what its similar to? The foam gasket behind the backing plate or axle flange.