I put Lizard Skin (both heat and sound) on both sides of the tub. Floor still got hot. Installed aluminum backed mat and still got HOT. Last thing I have done is install the heat shielding from my donor truck to the bottom of the tub around the tranny tunnel area. That cut the heat transfer tremendously. Note that I had already used shielding around the cat and the starter area, but until I put it on-the-tub, in the area I wanted protection did I see much change. I will install more of it when we get back from our trip.