Here is what Tuniq says about the product:
“TX-2 achieves the best interface between your CPU and the heatsinks by its unique designed molecular size and shape. Without any metal or electric conductive, Tuniq TX2 is safe, reliable and the most effective thermal compound for your valuable CPUs and coolers.”




Features:
Low thermal resistance for superior heat transfer, 4.5W/mK
Small molecular size makes a better contact between the heatsink and heatsource.
Thin bond line for hi-efficiency conductivity
Low bleed under high pressure
Spreads easy - clean consistency
Help the low-pressure clip design of cooler to achieve better cooling performance.
RoHS compliant
Not Electrically conductive



Specifications:
Appearance : Gray
Viscosity: 285000 cP
Thermal Conductivity: 4.5W/mK
Operating temperature: 45°C - 200° C
Specific Gravity: 3.96 @ 25° C
Volume: 3.5g



All testings showed that Tuniq TX-2 is the best thermal compound on the market.

In the past couple years, Arctic Silver 5 was the best thermal compound. But now, Tuniq TX-2 beats it by couple degrees. Even though TX-2's tube looks much bigger than Arctic Silver 5, both of them have same quantity. Also, TX-2 cost about 2$ less than Arctic Silver 5. So if you building a computer, no matter its high end pc or not, your number 1 stop for thermal compound would be Tuniq TX-2. In newegg it cost about $5. Make your decision, but I am using this thermal compound on my next pc. This product becomes BestPCReviews Editor’s Choice!

Pros:
Great price
Great performance
Easy to use

Cons:
Absolutely NONE



Tuniq official site