Thermal Grizzly

Thermal Grizzly Kryonaut

Ranked #12 in Thermal Paste

146 LP on the category ladder what's LP?

The textbook case of reviews-outliving-reality: brilliant fresh reviews, notorious drying and pump-out under sustained heat, and a premium price for the privilege. Duronaut or MX-6 are the better buys.

Consolidated from 3 independent outlets

Where the cited sources landed, as we read them

1 enthusiastic source

See the sources

Flagged as a product to avoid

8 of 12 research runs entered this as a product to avoid rather than a pick.

The community most consistently associates it with drying out and pump-out under sustained heat, and XDA's testing shows the advertised conductivity premium buys no real benefit. Fresh benchmarks look great, but eighteen months of a hot GPU later you are repurchasing.
Flagged 23 September 2026

The community most consistently associates it with drying out and pump-out under sustained heat, and XDA's testing shows the advertised conductivity premium buys no real benefit. Fresh benchmarks look great, but eighteen months of a hot GPU later you are repurchasing.
Flagged 23 September 2026
Charges flagship money per gram for performance MX-6 matches, is known to dry out under sustained heat, and Xda-developers' testing shows there is no real benefit in paying extra based on advertised conductivity.
Flagged 23 September 2026
It is a high-performance, high-maintenance compound with a well-known tendency to dry out and pump out under sustained heat, putting owners on the repaste treadmill PrimeTechSupport describes within a couple of years. If you want Thermal Grizzly quality that lasts, Duronaut is the correct purchase.
Flagged 23 September 2026
The most-hyped paste in the category and a genuinely good one, but it is the classic case of paying flagship money for a result MX-6 matches, and it has a well-documented tendency to dry out and pump out on hot dies.
Flagged 23 September 2026
Initial performance is strong but it pumps out within six to seven months in laptops, forcing frequent repastes.
Flagged 23 September 2026
Higher cost than comparable alternatives for identical temperatures, dries out faster than rivals, and offers no real benefit despite its high conductivity rating.
Flagged 23 September 2026
It dries out and pumps out under sustained heat, leading to repaste cycles, and its premium price is not justified compared to cheaper alternatives with similar performance.
Flagged 23 September 2026
Heavily marketed paste that offers no real benefit over far cheaper ID-Cooling compounds, making it a trap for beginners.
Flagged 23 September 2026

Why the boards include products to avoid

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Pros & cons

✓ Strong fresh benchmark results
✓ The most widely reviewed and cross-shopped premium paste in the category
✓ Performs well
✓ The enthusiast default that other pastes are tested against
✓ Third in a 2026 tested comparison

✗ Notorious for drying out under sustained heat
✗ Pump-out failure under thermal cycling
✗ Premium cost not justified by measured benefit
✗ Expensive per gram
✗ Known to dry out under sustained heat

The sources behind this ranking

We searched the web and YouTube for what has been published about this product, then read the articles, video transcripts and comments we found.

1 enthusiastic source

Vivid Repairs Vivid Repairs · reviewer · Jan 2026

Owner reports consistently describe Kryonaut as sitting in a good middle ground: it spreads under pressure without being a mess, and it doesn't drip or run if you take a moment to position things before tightening the cooler down. The listing's claim about filling microscopic gaps is the right framing: thermal paste's job is to eliminate the air gaps between two imperfectly flat metal surfaces, and a compound that spreads evenly and stays put does that job well.

Read

2 stance not read sources

XDA Article Read P

PC Bottleneck Calculator Article Read

Frequently asked questions

It ranks #12 of 15 on our thermal paste tier list, in F tier. That placement draws on 3 independent outlets.

Notorious for drying out under sustained heat. Pump-out failure under thermal cycling. Premium cost not justified by measured benefit. Expensive per gram. Known to dry out under sustained heat.