White silicone CPU / HEATSINK thermal compound. The Stars thermal paste AK-100 is a quick and easy thermal grease solution for installing a new CPU fan or heatsink. Use this thermal grease to maximize the contact between your heatsink and the CPU core or between a heatsink and other device (such as a video card, chipset, etc.) Easy to apply and conveniently sized for 1-5 uses. This is the heat sink paste to buy for one-time or few times use.