best type of insulation

[saltshaker]

with so many mfg's of insulation which type is best: Butyl, Close Cell Foam , Asphalt based or Cermanic for the interior of the car. Each Mfg make a variety of products...so, what realy works?
Jon

[lemans24]

Lizard Skin...

[Kramer]

what are you using it for....inside the car, outside....

[saltshaker]

This for inside...but what I am looking for is not the name of the product but what it is made of and if you like it!
Jon

[Kramer]

I don't know how to refer to it without the name, but I like the dynamat products. I specifically used the dynamat extreme matting. I found it easy to work with and very little heat or engine noise (besides the obvious roar of the pipes) comes though. Hope that helps.

Kramer

[juansofla]

No need for any insulation, it is not the floor/firewall , it's the air all around... wear ear plugs for the noise of the wind, like a vacuum, and the low bass sound of the sides pipes... the heat of the exhaust pipes is all around the car, you fell like you are on a frying pan, that heat feels like radiation from an oven, on your face and neck... it is really a terrifying experience to ride on a cobra, the passenger side has a handle called "panic handle"... insulation?