Quote Originally Posted by Martijn View Post
What is the stuff like? Is it a solid?
Like the name implies, it is a liquid metal. The surfaces must be extremely clean or the stuff just "puddles" up. But when everything is super clean a tiny amount spreads over the entire CPU leaving a very thin film of liquid metal. It is metal so it is very conductive so caution must be taken not to use too much.

Cleanup is a biatch, you have to lap the surfaces to remove it. Some people have experienced fusing of the block and CPU. But the performance was excellent.