I have a Velleman dissipative table mat - however, this is made of PVC and not good for soldering. The mat will not resist the heat from melting tin.
One simple way to solve it, is to use a baking mat on the table mat. Baking mat’s does not handle ESD, but they are temperature resistant.
The heat-resistant baking mat, can be easily replaced with a new, if it gets ugly when used, without need to replace the Velleman dissipative table mat.