i am not sure about that, but i was just about to make a comment about sound deadening...... we are putting FatMat in my g/f's car and so far we have the doors 100% done and the do not rattle at all anymore. this stuff is amazing and WAY cheaper than dynamat. i remember someone who said it wasnt as good as dynamat...well it sure does work good. so to answer your question it might work you may have to do 2 layers but it just might work.