Thermal Grizzly Kryonaut Extreme Thermal Paste

Kryonaut Extreme

Kryonaut extreme is a high performance paste. Maximum thermal conductivity through the smallest particle size and layer thickness, combined with improved low-temperature resilience are the basis for the best temperatures in extreme overclocking.

$120.39

Content: 33.84 g ($3.56 / 1 g)

Prices incl. VAT plus shipping costs

Content

2 g

6 g

9 ml

EAN: 4260711990069

MPN: TG-KE-090-R

Note

The packaging design of the 9 ml jar of Kryonaut extreme has been changed. Currently, both the old and the new packaging may still be in circulation. The product images already show the new packaging.

Status: 06/09/2026

Product information "Kryonaut Extreme"

Thermal Grizzly Kryonaut extreme is based on our well known Kryonaut paste. For Kryonaut extreme the maximum thermal conductivity was accomplished due to the smallest particle size, thinner minimum layer height and improved low temperature application.

Properties

designed for Overclocking
no curing
long-term durability
Available in three sizes: 2g | 6g | 9ml

Optimal thermal conductivity even under extreme conditions

Thermal Grizzly Kryonaut extreme is an extremely high performance thermal paste, which shows it’s true capabilities in cryogenic environments such as extreme overclocking with liquid nitrogen. Additional electrically non-conductive aluminiumoxide nano particles and improved application evolved Kryonaut extreme to our new high-end product.

In cooperation with leading engineers and pro-overclockers Thermal Grizzly made sure Kryonaut extreme works in ambient application such as water cooling as well as with extreme overclocking such as liquid nitrogen.

designed for Overclocking

Maximum thermal conductivity

no curing

long-term durability

Scope of Delivery

1x Kryonaut extreme 9ml
3x TG Spatula
1x Manual
1x Certificate of origin

Kryonaut extreme

Which version of Kryonaut Extreme suits my application, and what thermal conductivity and cooling performance does it offer?

Kryonaut Extreme is specifically focused on maximum performance in demanding applications and extreme overclocking at very low temperatures. The temperature you can achieve depends on power consumption, the cooler, the contact surfaces and installation. A fixed temperature advantage over other thermal interface materials therefore cannot be specified for every system. Compare performance under the same conditions. Thermal Grizzly has not published general W/(m·K) ratings since the end of 2020. A single thermal conductivity value does not allow a reliable comparison of cooling performance, as the test method, temperature, mounting pressure and contact surfaces all affect the result.

How long does Kryonaut Extreme last in use, what is pump-out, and when should I replace it?

There is no universal replacement interval for Kryonaut Extreme once installed in a system. Check temperatures under comparable loads and at comparable ambient temperatures. Replace the paste if temperatures show a confirmed deterioration or if you have removed the cooler. A universal service life cannot be specified. Temperature changes can gradually displace thermal paste from the contact area, a process known as pump-out. A thin, even layer of Kryonaut Extreme and correct cooler installation reduce this risk, but cannot eliminate it in every configuration. Duronaut and Duronaut Pro are designed for particularly high long-term stability. If temperatures rise again, also check the contact pattern.

How do I apply the correct amount of Kryonaut Extreme in a thin, even layer?

Clean and degrease the CPU or GPU and the cooler's contact surface, then let them dry. Apply Kryonaut Extreme at room temperature to clean, dry contact surfaces. Use the spatula to spread the paste slowly into a thin layer, applying even pressure. Avoid fast wiping movements, as they can lift the paste off the surface again. A thick consistency is not a defect in itself. Do not use solvents or oils to thin the paste, and do not press on the edges of exposed dies. Warming the product with a hair dryer can make it easier to apply. The amount needed depends on the contact area. Cover it completely with a thin layer, especially on exposed dies. A thick layer or a large amount extending beyond the contact area is not necessary. However, applying too much does not result in worse temperatures. Excess paste is squeezed out of the gap.

How can I check whether my Kryonaut Extreme is genuine, and what should I do if the verification code is invalid?

If your Kryonaut Extreme package includes an authentication card, check the code on the official website printed on it. A missing code or different packaging alone does not prove that a product is counterfeit, as package contents and packaging can vary by product and batch. If the code is invalid, send us photos of the product, packaging, code and proof of purchase so we can check them. Whenever possible, buy from a retailer on our reseller list.

Why are temperatures with Kryonaut Extreme too high or higher than expected?

First check that the cooler is seated correctly, the mounting pressure is even, the fans or pump are working correctly (for liquid cooling), and the contact surface is fully covered. When reinstalling the cooler, remove old residue and apply a fresh, thin layer of Kryonaut Extreme. Compare temperatures at the same room temperature and power consumption. CPU boost can turn improved heat transfer into higher performance rather than lower temperatures. Therefore, always check whether the CPU or GPU clock speed has changed as well.

Where can I find instructions, datasheets and safety or compliance documentation for Kryonaut Extreme?

Available instructions, technical data sheets, safety data sheets and conformity documents for Kryonaut Extreme can be found in the downloads section of the product page. Check the exact product name and item number. A technical data sheet does not replace a safety data sheet. If a document or language version is missing, tell us the item number and which document you need.

Is Kryonaut Extreme compatible with my CPU, GPU or cooler combination?

Kryonaut Extreme is intended for direct contact between the CPU or GPU and a correctly installed cooler. Conventional thermal pastes can be used on common copper, nickel or aluminum contact surfaces. Follow the cooler manufacturer's instructions. Larger gaps around VRAM or VRMs require suitable pads or putty. The paste is not suitable for bridging gaps larger than 0.2 mm.

Is Kryonaut Extreme suitable for laptop CPUs and GPUs?

Kryonaut Extreme can be used on CPU and GPU dies in laptops if the cooling system is designed for thermal paste and makes reliable contact. Cover the entire die with a thin layer. Larger gaps around memory and voltage regulators require suitable pads or putty. If pump-out keeps occurring, long-term stability and the specific cooler geometry matter more than a general comparison value. Duronaut or Duronaut Pro are generally better suited to laptops.

What temperature range and extreme conditions is Kryonaut Extreme suitable for?

Kryonaut Extreme was developed for a temperature range of −250 to +350 °C. This material specification is not a blanket approval for every continuous high-temperature process. For special applications, exposure duration, contact materials, layer thickness and mechanical loads must be assessed separately.

Is Kryonaut Extreme suitable for direct-die cooling or a delidded CPU?

In principle, Kryonaut Extreme can be used directly on a silicon die if the cooler and its mounting system are designed for this purpose. For Thermal Grizzly direct-die coolers and the underside of our High Performance Heatspreaders, we recommend using liquid metal such as Conductonaut or Conductonaut Extreme. General suitability for thermal paste does not override this product-specific requirement. Kryonaut Extreme can be particularly susceptible to pump-out in direct-die CPU applications.

Is Kryonaut Extreme electrically conductive, and how do I prevent short circuits?

Kryonaut Extreme is not electrically conductive. Nevertheless, only apply the paste to the intended contact surface. Residue in the socket or on connector contacts can interfere with mechanical and electrical contact. The paste is not a certified electrical insulator for high-voltage applications.

How do I remove Kryonaut Extreme or clean the contact surfaces?

First remove Kryonaut Extreme from the surface using a dry, lint-free cloth. Then clean the surface with isopropyl alcohol or a material-compatible TIM cleaner such as TG Remove. TG Cleaning Wipes include both dry wipes and wet wipes soaked in cleaning agents. Keep cleaning agents out of sockets and connectors, and allow all surfaces to dry completely. Use fresh paste when reinstalling the cooler.

How should I store Kryonaut Extreme, and how long can an opened or unopened pack be stored?

After use, seal the Kryonaut Extreme syringe tightly and store it in its original packaging in a dry place, protected from light and major temperature fluctuations. Shelf life is different from service life once installed in a system. Before using older paste, check it for contamination and unusual consistency. If you are unsure, we can check the batch using photos and purchase details. An unopened tube of Kryonaut Extreme can be used for up to 10 years, and an opened tube for up to 5 years without any problems.

Downloads "Kryonaut Extreme"

Color:	pink
Density:	3.76g/cm³
Electrical conductivity:	0 pS/m
Viscosity:	130 -180 Pa⋅s

Goes perfectly with it:

TG Spatula

Spatula for even and precise distribution of thermal paste, suitable for all Thermal Grizzly pastes

From $5.73

TG Cleaning Wipes

Wet and dry cleaning wipes for cleaning surfaces

$12.75

TG Remove

Effective acetone-based nano-cleaner for removing thermal paste and liquid metal

$13.92