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Thermal Grizzly - Hydronaut - 3.9 Gram/1.5 ml - Conductive High Performance Thermal Paste - Ideal for Air and Water Cooling CPU/GPU/PS4/PS5/Xbox - for Large Cooling Surfaces

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Availability: In Stock.
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Arrives Wednesday, Jul 29
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Size: 3.9 Gram / 1.5ml


Features

  • ULTIMATE OVERCLOCKING PERFORMANCE - With its outstanding thermal conductivity, Hydronaut can handle overclocking, making it perfect for users with large heatsinks seeking a high-quality product at an attractive price-performance ratio, such as for their water cooling system
  • PRECISE APPLICATION - The practical syringe allows for easy application of this thermal paste, delivering it exactly where it needs to be. Ideal for CPU and cooling, GPU, LEDs, and heat sink fins
  • PERFECT HEAT CONDUCTION - Provides awless heat transfer without integration into the processor. Excellent thermal conductivity; thermal resistance of 0.0076 K/W
  • VERSATILE COMPATIBILITY - Compatible not only with computers or laptops but also with PS 3, 4, 5, Xbox 360, One, and Series X consoles! Perfectly dissipates heat from MacBooks
  • LONG-LASTING STABILITY - Hydronaut thermal paste does not harden and oers high long-term stability. It does not require a hardener, contains no silicone, and is non-conductive

Description

Visit the Store Optimized for medium and large heat sinks, Hydronaut delivers consistent peak performance. Perfect for water cooling and large systems requiring maximum heat dissipation. Available in four sizes: 1g | 1.5ml | 3ml | 10ml The silicone-free structure of Hydronaut thermal paste ensures flexibility and easy application without curing. This keeps your cooling system reliably cool and the thermal paste durable and efficient over time. Hydronaut 1.5ml includes an applicator to make applying the thermal paste easier. My thermal paste is difficult to spread or comes off the surface. What can I do? The surface should be thoroughly cleaned and be free of grease before use. The thermal paste should be at least at room temperature when applied. It is important to spread the thermal paste very slowly during application. How long is Thermal Grizzly thermal paste usable after opening? With proper storage and packaging, the thermal paste can be used for at least 3 years without issues, and in many cases, significantly longer. Why can't I find the thermal conductivity value on the packaging? The typically theoretical thermal conductivity values vary greatly depending on the application, as important factors such as contact pressure, temperature, or surface cannot be uniformly accounted for. Should I store the thermal paste in its original packaging after use? Thermal Grizzly thermal paste packaging is specially coated on the inside to protect the syringe and its contents from UV radiation and other environmental influences. We recommend storing it in the original packaging. The surface should be thoroughly cleaned and free of grease before use. We recommend using TG Remove or TG Cleaning Wipes for cleaning. The thermal paste should be at least at room temperature when applied. When applying, it is important to spread the thermal paste very slowly. For a typical Intel or AMD CPU, a single spreading motion should take about 3 seconds. The slower the movement, the easier it is to spread the paste evenly. TG Hydronaut – 1.5ml TG Aeronaut – 1.5ml TG Duronaut – 2g TG Kryonaut extreme – 2g TG Kryonaut – 1.5ml TG Spatula PRO TG Spatula

Product Dimensions: ‎22 x 11.5 x 22 inches


Item Weight: ‎0.138 ounces


Manufacturer: ‎Thermal Grizzly


Item model number: ‎TG-H-015-R


Is Discontinued By Manufacturer: ‎No


Date First Available: ‎June 13, 2015


Frequently asked questions

If you place your order now, the estimated arrival date for this product is: Wednesday, Jul 29

Yes, absolutely! You may return this product for a full refund within 30 days of receiving it.

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View our full returns policy here.

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Top Amazon Reviews


  • Great stuff, easy to use
Size: 1 Gram
I did a lot of research into thermal paste. This was what I settled on for my AIO. Would it have made a difference? I don't know for sure, but I know I've been happy with the performance and use of this product. Is it one of the best pastes? Yes. Is it one of the longer lasting pastes? Yes, from what I can tell. Was it easy to use? Yes. Spread was easy, but you can easily use a line and spread it with heat sink pressure as well. It's thick enough that it can stick if you want it to and can coat a device easily. Is it the absoulte best? Specs say no. but... Is it a great value? Yes. The more expensive stuff has ratings that are barely better than this at 3-5 times the price. At best, that might find you an extra 1-2C when doing some pretty extreme things. I'm a power user, but I'm practical. This stuff is great for my PC, and one day I may repaste my old laptop with this as well. Given I've leaned into undervolting vs Overclocking, this gives me all the performance I need. ... show more
Reviewed in the United States on October 31, 2023 by Bront

  • Works great and has plenty extra jsut in case
Size: 1 Gram
Cool stuff! Literally… I’ve tried a few kinds of thermal paste and as far as I can tell this one has been the most effective. Much better than the junk that came with my CPU cooler. Even the small size has enough to use it at least three times.
Reviewed in the United States on January 28, 2026 by Jason

  • At least 5 to 10°C less, UNBELIAVABLE !!!
Size: 1 Gram
This thermal paste got my RTX 3070 Asus Dual OC from 85°C to 70/75°C and my i7 12700KF from 75°C to around 65/70°C, it is amazing the big impact on temps, i totally recommend this thermal paste, 1 gram is more than enough to cover CPU and GPU and still i have some left.
Reviewed in the United States on March 30, 2026 by Fernando Spray

  • Expensive but good!
Size: 1 Gram
After a year or so the paste didn’t dry, not in the tube nor on the cpu. Very happy with thermal grizzly products. It’s second time I bought it and I will buy it again! Very solid!!!
Reviewed in the United States on January 14, 2026 by Bogdan

  • Don't apply too much.
Size: 1 Gram
This product provides good performance for the price it had and it's overall easy to apply as it comes with a paste brush applier. OVerall it's a good thermal paste to go to for any pc.
Reviewed in the United States on May 12, 2024 by Derek

  • Hydronaut
Size: 1 Gram
Worked great on preventing heat creep on the 3D printer!
Reviewed in the United States on July 4, 2026 by Weston Ray

  • Great Effect!
Size: 3.9 Gram / 1.5ml
This is a very easy thermal interface to work with as it spreads very easily and you don't need much to spread across the entire IHS even on new larger CPUs like Intel's 12th or 13th gen. Temps are great and I see no issues with dry out or degradation in the first few months of use I would have preferred a spatula for spreading instead of the weird heads that you can put on the tube and spread directly on the die. This seems to be a good spot for cost to effect as you get greatly diminished returns on Thermal Grizzly's other more specialized options or other premium thermal interface materials that cost more, and you get notably better thermal results than cheaper offerings from other competitors. ... show more
Reviewed in the United States on July 28, 2023 by Apes_Vs_Grapes

  • perfect
Size: 1 Gram
good stuff
Reviewed in the United States on May 25, 2026 by J W

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