On my CRX I noticed if I sit at a stop light for a couple minutes and then start driving I feel heat from the engine on my legs. I feel it in the winter, but in the summer it's annoying because it's hot out to begin with. I figured the heat is going through the firewall and using some barrier I can keep it out. I really just need a heat barrier, but sound dampening wouldn't hurt. I saw dynamat sells some sheets, but I also saw brands like Summit and Eastwood selling cheaper sheets but seem to be the same thickness and quality. What do you guys use? What is the best heat barrier?

I figured I would put some small sheets around the hatch area and on the doors to reduce rattle, but is there a big advantage to doing the whole floor with it? Any experience/advice is appreciated.

 

If you really want to stop the heat, then you want reflective foil. However, that won't do anything for sound or rattling.

 

Does that only work on the engine side of the firewall or does it work on the interior side?