Fiberfill?

Does this work in doors too? even if you already have treated them with mat , or is that over kill?

Thanks

Your door naturally condensate water through the natural process of condensation.  Your doors also leak a little inside the doors when it rains, or when you wash the car.  Therefore; you cannot place any sort of fill in your doors because it would become a sponge and its dampening abilities would be nullified.  Also, it would interfere with the mechanisms in the door (dont ya think)?

If you want an enclosure, fiberglass is your answer.