Heat sink Paste...someone mentioned silver?

In one of the other threads, someone mentioned Silver Heat sink goo.
Is this more efficient than the white stuff, or the sticky black ??? that came with my generic AMD cooler ?

Is it readily available - I've never seen it at a computer store. Perhaps an electronic shop???

CHEERS

There you go..

Arctic Silver 5 premium thermal compound (http://www.coolpc.com.au/store/index.php?item=509)
Or
Arctic Silver 3 (http://www.coolpc.com.au/store/index.php?item=99)

Available online in Aus :D

You can find links to more Arctic Silver dealers here (http://www.arcticsilver.com/dealers_and_distributors.htm)

Thanks, Man