10 Best Thermal Pastes 2026 in the United States

The Gelid-Solutions TC-GC-04-B GC-4-3.5g Thermal Compound features a synthetic thermal filler designed to maximize heat transfer between your CPU or GPU and its cooler. Its non-electrical conductivity and non-corrosive nature make it safe to use around delicate electronic parts without risking short circuits or damage, which is especially beneficial for beginners or those concerned about application errors. It includes an extra applicator to facilitate easier and neater spreading, aiding users who may be less experienced in applying thermal paste.

The package contains 10 units of 3.5g each, making it suitable for multiple applications or working on several builds. This product offers a safe, easy-to-use thermal paste with good performance and value for users needing multiple uses. If you require very high-end thermal conductivity figures or detailed durability information, you may want to consider more specialized options.

Thermal Grizzly Conductonaut Extreme is a liquid metal thermal paste known for its extremely high thermal conductivity, making it suitable for demanding CPU and GPU cooling needs. This means it can significantly lower temperatures compared to standard pastes, which helps reduce noise from cooling fans and improves system performance. The paste is made in Germany, reflecting good manufacturing quality, and comes in a 5-gram size, enough for multiple applications (up to 30 CPUs, depending on size). A key point to note is that it cannot be used with aluminum parts due to corrosion risks, so it's best suited for systems with copper or nickel surfaces.

In terms of longevity, Conductonaut maintains its performance over time without needing frequent reapplication, which is a plus for long-term use. However, being a liquid metal, it requires careful handling during application because it’s electrically conductive — if it touches other components like the motherboard, it could cause shorts. This means it’s better suited for experienced users comfortable with precise application. The product doesn’t require a long curing time, offering almost immediate thermal improvement.

It offers excellent value for users wanting top-tier cooling, although beginners might find it tricky to apply safely. Its incompatibility with aluminum limits its use in certain builds. For those seeking one of the best thermal conductivities available and who can apply it carefully, Conductonaut Extreme is a powerful choice for advanced PC cooling setups.

Arctic Silver AS5 is a high-quality thermal paste known for its strong heat transfer abilities, thanks to its special mix of pure silver particles. This helps your computer’s CPU or GPU stay cooler, especially in setups with powerful processors or water cooling. The paste contains a high amount of thermally conductive filler (over 88% by weight), which is great for efficient heat movement. It is a synthetic thermal compound that comes in a syringe, making it relatively easy to apply, although its medium to high thickness means you need to spread it carefully for the best results.

Arctic Silver AS5 is not electrically conductive, which reduces the risk of short circuits if applied carefully. It requires a curing time of up to 200 hours after application to reach maximum performance, so it won’t show its full potential immediately. The paste is also water-resistant and compatible with ceramic materials, adding to its durability.

This thermal paste is well-suited for users looking for a long-lasting, efficient product and who are comfortable with a slightly more involved application process due to the curing period and careful spreading required.