Foam latex can easily be repaired with liquid latex. The trick is to apply it sparingly, so that the two parts to be joined will stick together. Then place it aside for a few hours. Too much latex will cause the join to show up as a bumpy line or area.

Tears in vinyl or slushcast items are another story. If you have the patience to put the edges back together, you can do it. Otherwise, it will be a very difficult repair job, and the appliance may or may not be usable.