Noctua NT-H1 Thermal Paste Review
 

After several attempts to get equal amounts of paste on the CPU, it was clear that two of the white pastes, Thermalright (Type 2) and Arctic Silver Ceramique, sank lower to the surface due to a lower viscosity, almost approaching a liquid state. Arctic Silver 5 and Noctua NT-H1 were both notably thicker, but the Arctic Silver 5 appeared wetter than the Noctua NT-H1. With Noctua's offering being the most viscous paste in this group, I wondered if it would be difficult to spread thinly on the bare dies of chipsets and unlidded CPUs.

http://www.overclockersclub.com/reviews/noctua_nt_h1/