not sure if this is the exact stuff people have used, but peal-n-seal from lowes is very similar
http://www.lowes.com/lowes/lkn?action=productDetail&productId=154017-81326-PS625I've read that it doesn't stick as well as the Dynomat type stuff, so maybe use something else on vertical surfaces. I've also read that doors are generally the single biggest improvement spot, though tougher to do. I'll use the peel n seal on my floor and something else in the doors if i ever get that far along...