TFL NX-15 Thermal Grease

Description from thefloatlife.com:

If you're doing work to your GT/GT-S and end up having to take off your Cold Ones in the process, then you're going to want the highest rated 15 W/mK thermal paste for when you reinstall your GT Cold Ones.

Includes: 4g of NX-15 Thermal Grease, 1 paste spreader