Stick down sound proofing ,Insulation?

Hey disagree if you like, but I’ve tried both and I know I won’t waste money on dynamat to get the same performance. The FatMat rattletrap works just as well or better for less. Dynamat was great when they were the only game in town, but now they’re just charging more for their name. Looks fancy, but that doesn’t make a difference under the carpet.