If i'm not mistaken, the Dynamat Original is Rubberized Asphalt based, whereby the Extreme is Butyl based.

I would rather say it's an overpriced bitumen roll used for sealing leaking roofs, could be had for less than half the price. No offense.

I can't be 100% sure as i haven't seen the thing in real life, but from the looks of pics, it IS in fact bitumen strips that can be bought for much cheaper. Downside is, it melts when exposed in the hot weather for a while(knowing our country's wheather)

Well, i know i don't really have proof, but being myself selling some other dampening material, it wouldn't be nice for me to juz drop into a seller selling similar stuff's thread to say things or request to see then tarnish.

One thing though, i didn't post up RAAMMAT BXT60 for sale in lowyat.net, if you are interested, PM me and i'll provide u the details.

Sound dampening material is meant to be stuck on permanently, so... it wouldn't be easy to remove else it'll just defeat it's purposes