Product Description


Thermal Grizzly
- Hydronaut can be used for overclocking due to it’s excellent thermal conductivity, but it was created specifically for users with larger-scale cooling solutions, who are looking for a quality product with an excellent performance.
- Hydronaut achieves the best thermal conductivity effects (11.8 W/mk) in large and medium-sized cooling systems, also in liquid cooling systems.
- A special cap, included in the kit, allows precise and even distribution of the paste over the entire contact surface of the cooled system.

Thermal Grizzly Hydronaut Thermal Paste
About Product
Hydronaut achieves the best thermal conductivity effects (11.8 W/mk) in large and medium-sized cooling systems, also in liquid cooling systems. It is extremely safe to use, as it does not conduct electricity and can be used in cooling systems with aluminium components. Thermal Grizzly Hydronaut is not time-curing.
Light and Flexible Texture
It is extremely light and highly flexible as it does not contain any silicone. A special cap, included in the kit, allows precise and even distribution of the paste over the entire contact surface of the cooled system. Thermal Grizzly Hydronaut achieves best results when used in medium and large cooling solutions.
Compatibility
- PS3, PS4, PS5
- Xbox 360, One, Series S and Series X
- Great for dissipating heat from Macbooks.
- Computer components such as CPU, GPU, LEDs, heatsinks, and fans.
- It can work with almost any system either with air or with liquid nitrogen (down to -200 °C).
- The supplied cap makes it easy to apply the paste precisely.

Most Important Features:
- Ideal for overclocking performance
- Excellent thermal conductivity
- No curing required
- Contains no silicone
- Does not conduct electricity
- Applicable with aluminum
- Able to operate in conditions from -200 °C to 350 °C

Thermal Grizzly Hydronaut Set
- Description: Thermal Grizzly Hydronaut is a high performance thermal grease.
- Properties: Thermal Grizzly Hydronaut is a very high performance thermal grease, which shows its true capabilities in cryogenic environments. Hydronaut thermal grease sports high long time stability, all without curing. Hydronaut thermal grease is silicone-free.
- Applications: Thermal Grizzly Hydronaut is best used with applications in need of high temperature resistance, for example those in electrical or computer engineering. Of course, Thermal Grizzly Hydronaut can also be used in a wide variety of other lines of industries. Hydronaut thermal grease was created especially for larger-scale cooling solutions. Thermal Grizzly Hydronaut is best applied with the Thermal Grizzly applicator, but it can also be applied by way of brush, spatula, silkscreen or pad printing.
- Storage: Thermal Grizzly Hydronaut should be stored in its original packaging, in a dry environment at room temperature.
Hydronaut Technical Details
Thermal Conductivity: | 11,8 W/mk |
Thermal Resistance: | 0,0076 K/W |
Electrical Conductivity: | 0 pS/m |
Viscosity: | 140-190 Pas |
Density: | 2,6 g/cm³ |
Application Temperature: | -250 °C/+350 °C |
Standard Sizes: | 1 g; 3,9 g; 7,8 g; 26 g |
Consistency: | Soft |
Colour: | Light grey |
Possible Thickness: | Variable |
Silicone Based: | No |
Typical Application: | CPUs, GPUs, Notebooks, ICs |
Moonwalker –
It work greatIt’s a great product and I will buy it again
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Mr. N. Wotton –
The bestOne of the best on the market
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Anthony –
Awesome pasteAwesome paste I like not use anything else from now on
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Petra Rozalia Paksi –
Nice quality thermo paste, and easy to use.My boyfriend used this to add thermo paste again for the cooling in his Playstation 4. The thermo paste was perfect 🙂
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London –
all rightall right
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Rafael –
Works for gaming laptop as can handle high temps without pumping outUsed for a gaming laptop GPU, didn’t degrade a bit since application, isn’t specified but takes 48h to show full performance
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Rochel realis –
WorkedBought it to change thermal paste on my Asus nv80vd as the temperature reaches it maximum 100 degree temp when playing games. This thermal paste works as it decreases the temperature on my laptop dowm to 70 degrees so it worked.
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Glenn –
This is a must for laptopsAmazing thermal paste for CPU and GPU. Decided to repaste my laptop, gaming GPU temps were 80-85, idle was 50+ when plugged in. Repasted my CPU and GPU with Hydronaut using the “Line Method”. As for the VRM components, i used K5-pro thermal paste to replace the thermal pads on the VRMs. Gaming GPU temps dropped to 60 on same fan speed (Insane drop i know). Idling temps dropped to high 40s. This is a must for laptops. Try not to get kryonaut for laptops because they start out good, but burn out pretty fast. Hydronaut is better, and easy to spread as well. Get the K5-pro for the VRMs, do not use K5-pro on CPU or GPU. Good luck and please repaste! PS: Remove battery before u repaste or drain it to zero if undetachable. IT IS A MUST OR U RISK SHORTING MOTHERBOARD.
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Agostinho Dias –
Fantastic performance, easy to applyI think the picture tells a thousand words.I bought this thermal grease because one of my servers was showing unusual high temperatures while under heavier load. This is important for me as this machines runs 24×7 non stop all year. I found it had the factory thermal pad and all was correctly assembled. However, this is a consumer machine and probably not meant for always-on. Reading about it I also found that different thermal grease compounds perform differently and found the Thermal Grizzly Hydronaut to be among the best in reviews. So I decided to try it. My servers uses LibreHardwareMonitor to keep logs of CPU load and temperature so I thought it would be easy to compare.Appling the thermal grease is easy. It comes on a syringe and has an accessory to help spread the grease flat and uniform. Assembled everything back together and powered it on. Today I was curious and checked the LibreHardwareMonitor logs. It’s a fact that the temperatures came down quite a bit. Makes sense. The grease transmits the thermal energy faster to the heat sink which in turn dissipates it. The CPU does not accumulate as much thermal energy. I’m an happy customer. On the pictures you’ll see that around 2AM CPU load increases. That’s the file server backups and the virtual machines backups running. On the top 2 graphs you’ll notice temperatures are higher at that point in time than in the bottom 2 graphs which are from the 21/10/2020 after applying this thermal grease.
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Johnny Wad –
Great product for the price.Great productUsed this on RTX 3080 tiGave me the same temps as KryonautFor 1/3 the priceIt’s much easier to apply so I spread it on really thinKryonaut is harder to spread to I used pea method and just put a small dab in centre
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Stephen Shaw –
The BestI can not say much else, for AIOs and Tower Coolers, this is the best, by far, with no direct competition.You may be told MX-4 is as good, it is not, I’ve done direct comparisons with CPUs and GPUs and this thermally is around 5% better, I’ve been using it on multiple devices since the date of purchase and have not had to re-paste, even though I run things is non ideal conditions at high thermal envelopes.
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cosmos –
Five Starsgreat
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Ben –
Five StarsTested for thee weeks great product
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Andres S. –
good productgood product
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Chaton –
Bon !!Efficace mais cher
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Rob –
Used it for my GPU and am very happy. Now to do all the PC’sOrdered from MemoryC on July1. It shipped on July 6 from Sweden and arrived today. Used it for my GPU and am very happy. Now to do all the PC’s. May need to order more.
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Brad C. –
Excellent Thermal PasteGreat thermal paste, dropped my temperatures by ~5 C from my old silver paste. Spreads quite well, no issues at all with the application. The resalable bag is very convenient and the removable applicator tip is the best I have used on a thermal paste.
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Marien Fournier –
Un produit de qualité très supérieureTrés bon produit. Performance très supérieure à beaucoup d’autres graisse thermique. Le seul point négatif est la difficulté d’application, qui peut-être résolue avec un séchoir à cheveux lors de l’application, d’ou les 4 étoiles. Somme toute, entièrement satisfait.
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Tekyfreak –
Great value for the priceWorks as advertised. I will be buying this product again and recommend it to my friends.
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Wolf –
Better than thermal paste supplied with water blocks / AIO’sStuff is pretty awesome. Have a 5950x with a water block. When using the thermal paste supplied with the block temps were high 70’s C. Replaced it with Hydronaut and now the temps never go above 70 C.
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Caesar –
-8 degrees at gpusuper like! my gpu went from 85 to 76 degrees Celsius witch clearly indicates the performance of this thermal paste. (stock air cooling) .i would buy again. plus it comes with two paste spreaders/scrapers.
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Ty –
Might be great but wouldn’t know, arrived broken.Waited about 2 weeks for it to show up which sucks as its been holding up my computer build, It arrived today and the tip had broken off, not sure if it happened in transit as the paper thin plastic bag offered 0 protection or if it happened before that if so when? Either way will be returning as its unacceptable and I no longer trust the thermal conductivity. Very disappointing.
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Purchaser –
Used on GPU noticed difference immediatelyI used this on my main GPU in my gaming PC and I noticed temperatures drop immediately after application and having tested with furmark over several successive passes.Pros:- Easy applicator- With proper installation you should notice the difference immediately- Great for GPUs or other scenarios where you need a non conductive non curing compoundCons:- Some wasted paste will end up in applicator after use if you need to seal up the tube (maybe have a cap for the applicator)?- Storage bag is rather large
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Zachary Hawkshaw –
Best value from Thermal GrizzlyIt’s expensive paste but it’s one of the cheaper pastes from Thermal Grizzly and you won’t notice the difference from Kryonaut.Kryonaut also contains silicone, which could be bad in some instances because it’s not a very good conductor of heat and it makes pastes more runny and oily. Hydronaut doesn’t contain such oil.
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