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Thermal Grizzly Hydronaut 3.9g thermal paste syringe with spatula

Thermal Grizzly

Thermal Grizzly Hydronaut 3.9g thermal paste

SKU CH-Q0J6-QNQ9W

High-performance thermal compound with 11.8 W/mK conductivity for CPUs, GPUs and consoles, supplied in a 3.9 g syringe with spatula

Model 3.9g

  • High thermal conductivity of 11.8 W/mK for overclocking headroom
  • Non-conductive formula prevents electrical shorts on CPUs and GPUs
  • Does not harden, ensuring long-term stability without re-application
  • Easy application with included spatula and syringe design
  • Compatible with PCs, consoles and MacBooks for versatile use

Compact 3.9g Syringe

Thermal Grizzly Hydronaut is a high-performance thermal compound supplied in a 3.9g syringe. It is designed for enthusiasts and builders who want premium heat transfer for CPUs, GPUs or console processors. The paste is non-conductive, contains no silicone and will not harden over time.

Upgrade from Stock Paste

This compound replaces basic factory-applied grease or generic white paste with a thermal conductivity of 11.8 W/mK and a thermal resistance of 0.0076 K/W. The jump is worth it when lowering core temperatures under sustained loads matters, such as during overclocking or when using large heatsinks that demand a more compliant interface material.

Build Integration

The included spatula and syringe allow precise, mess-free application on bare dies or integrated heat spreaders. Because it does not cure, rework is straightforward and there is no risk of pump-out or siloxane migration. It suits air coolers, custom loops and direct-die laptop or console upgrades alike.

How it compares

Measured against everything we stock in Thermal Paste, at today’s prices. Recalculated every night.

Price $9.99
Cheaper than about 70% of the 498 comparable items (median $12.99).

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Specifications

No published specifications for this item yet.

Other versions of this model

1 more in the same range

Questions about this item

Does the 3.9 g syringe include an applicator for spreading the paste?

Yes, a Thermal Grizzly branded spatula is included for convenient application.

What is the correct way to apply Hydronaut so it covers the die without air pockets?

Place a small dot in the centre of the CPU or GPU heat spreader, then use the supplied spatula to spread a thin, even layer before mounting the cooler.

Will the 3.9 g tube need replacing after a certain time once applied?

The compound does not harden and has high long-term stability, so it does not require periodic replacement under normal use.

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