Best Thermal Paste for CPUs in 2026

The best thermal paste for CPUs in 2026 is the one that is easy to apply, lasts for years and costs a few dollars — because the difference between the best paste and a decent one is only a couple of degrees, and the application matters far more than the brand. Buy a good, well-reviewed paste, apply it properly, and you will never need to think about it again.

What makes a thermal paste good?

A good thermal paste has three qualities: it conducts heat well, it spreads easily without trapping air, and it lasts. Thermal conductivity is measured in watts per metre-kelvin, and a higher number is better — but the difference between a paste rated at 8 and one rated at 12 is only a degree or two in practice. What matters more is that the paste does not dry out, does not pump out from between the CPU and the cooler over time, and does not conduct electricity, so a spill does not short anything. Our how to apply thermal paste correctly guide shows that the application matters more than the paste itself, and our CPU cooling basics guide explains what the paste does in the cooling chain.

The types of thermal paste

There are four main types. Ceramic paste is the cheapest and the safest — it does not conduct electricity, it is easy to apply, and it lasts for years. Metal-based paste, usually with zinc oxide or aluminium oxide, conducts heat a little better and is the most common type in good coolers. Carbon-based paste uses tiny carbon particles and performs well without conducting electricity. Liquid metal is different: it is a real metal alloy, it conducts heat far better than any paste, and it is electrically conductive — which makes it risky, because a spill can short the motherboard. For most people, a ceramic or metal-based paste is the right choice.

Best thermal paste for most people

For most people, the best thermal paste is a well-reviewed ceramic or metal-based paste from a known cooler maker — the same paste that comes pre-applied on a good cooler is usually fine. It costs a few dollars, it comes in a tube that lasts for several applications, and it is forgiving: if you use a little too much, it squeezes out harmlessly. A Ryzen 7 9700X or a Core i5-14600K with a good paste and a good cooler will run cool and quiet — see our how to choose the right CPU cooler guide and our best CPU cooler for gaming guide.

Best thermal paste for overclockers

For overclockers, a high-performance metal-based or carbon-based paste is worth the small extra cost, because every degree matters when you are pushing the voltage. Liquid metal gives the biggest gain — often 5–10°C on a 14900K — but it is only for experienced builders: it is conductive, it can damage aluminium cooler bases, and it needs careful application and sealing. Our best CPUs for overclocking guide and our overclocking basics guide explain when the extra cooling actually matters, and when a good paste is enough.

Best thermal paste for laptops

For laptops, the best thermal paste is one that lasts — a thick, stable paste that does not pump out under the repeated heating and cooling of a laptop, which runs hotter than a desktop. Laptop paste is harder to replace, so longevity matters more than the last degree of performance. If your laptop is overheating, see our why is my CPU overheating guide, and check the temperature first with our how to monitor CPU temperature guide.

What to avoid

• Liquid metal on an aluminium cooler base — it corrodes aluminium.
• Very cheap, unbranded paste — it dries out in months.
• Old paste that has been open for years — it separates and performs badly.
• Using too much paste — it squeezes out and makes a mess.

The bottom line

The best thermal paste is a good ceramic or metal-based paste, applied properly, and replaced every two to three years. It costs a few dollars, and it is one of the cheapest upgrades you can make. Browse our cooling guides and our how to improve PC airflow guide for the next steps.