10 Best Thermal Compounds 2025 in the United States

The Arctic Silver AS5-3.5G thermal compound is known for its high-quality composition, featuring 99.9% pure micronized silver. This ensures excellent thermal conductivity, which is crucial for efficient heat dissipation from your CPU or GPU. Rated with a thermal conductance of over 350,000 W/m2 degreesC (0.001 inch layer), it is quite capable of keeping your components cool during intense use.

Its non-electrically conductive nature means it won't cause any short circuits, making it safe to use in close proximity to electrical components. Additionally, it is designed to stay in place without separating, running, migrating, or bleeding over time, contributing to its longevity and stability. Application and removal are relatively straightforward, making it user-friendly even for those who aren't very tech-savvy.

Weighing 14 ounces and being non-electrically conductive are definite pluses, as is its compatibility with major CPU sockets and heatsinks. This product would benefit users looking for a reliable, easy-to-use thermal compound capable of providing long-lasting thermal management for their systems.

The Thermal Grizzly Kryonaut Extreme is a top-tier thermal paste known for its impressive thermal conductivity of 14.2 W/(m·K), making it ideal for users who need high performance, like overclocking enthusiasts or gamers. Its high thermal conductivity means it can effectively transfer heat away from your CPU or GPU, helping to maintain lower temperatures and promote better system performance.

The paste is designed to be easy to apply, with a syringe and an applicator included in the package, which means you won't struggle with messy applications. Additionally, it boasts long-term stability, maintaining its effectiveness at high temperatures up to 80 degrees Celsius, ensuring that your system remains cool over time without needing frequent reapplications.

However, at 2 grams, the amount might be a bit small if you plan to apply it to multiple devices frequently. Despite this, it claims to cover up to 12 CPUs depending on your application size, making it quite efficient. This product doesn't conduct electricity, eliminating the risk of short circuits, which is a great safety feature. The cost might be on the higher side compared to other thermal pastes, which could be a consideration if you're on a budget. The Thermal Grizzly Kryonaut Extreme is perfect for those who demand the best performance and longevity from their thermal paste, particularly in high-performance and gaming setups.

The Thermal Grizzly Conductonaut Extreme Thermal Grease is an excellent choice for cooling CPUs and GPUs, noted for its high thermal conductivity. This liquid metal thermal paste is highly efficient and perfect for demanding configurations, thanks to its ability to significantly lower temperatures and enhance performance. Users will appreciate its long-lasting stability and substantial thermal conductivity, which is up to 10 times greater than many other thermal greases.

However, it is important to remember that this compound should not be used on aluminum components due to a risk of corrosion, and it is most suitable for experienced users who can handle its application with care. Users find the product to be cost-effective, as one gram can be used for multiple applications, potentially up to 30 CPUs depending on the use. With a high customer rating of 4.8 out of 5 stars, it is trusted by many for its performance.

Its application can be a bit tricky due to its liquid metal nature, so it may not be the best option for beginners. This thermal grease is ideal for advanced users wanting to maximize their system's cooling efficiency.