Thermal Grizzly Kryonaut (Silicone-Based/12.5 W/mK/Non-Conductive/Premium Enthusiast and Overclocking Pick)
- Model:
- Thermal Grizzly Kryonaut
- Compound Type:
- Silicone-Based
- Thermal Conductivity:
- 12.5 W/mK
- Electrical Conductivity:
- Non-Conductive
- Package Size:
- 1g / 5.55g / 11.1g tubes
- Recommended Use:
- High-end CPU/GPU (including overclocking)
- Reapplication Interval:
- 1-2 years typical
- Safety Notes:
- None
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Manufacturer: Thermal Grizzly Last updated: September 10, 2026
Description
Thermal Grizzly Kryonaut is repeatedly ranked as the top-performing traditional (non-liquid-metal) thermal paste currently available, with a genuinely strong 12.5 W/mK conductivity rating that leads the field of safe, non-conductive compounds. It's the specific recommendation for extreme overclockers and high-end builds where every fraction of a degree of thermal headroom matters, at a real price premium that reflects its small package size and premium positioning.
Thermal Grizzly Kryonaut is repeatedly ranked as the top-performing traditional (non-liquid-metal) thermal paste currently available, with a genuinely strong 12.5 W/mK conductivity rating that leads the field of safe, non-conductive compounds. It's the specific recommendation for extreme overclockers and high-end builds where every fraction of a degree of thermal headroom matters, at a real price premium that reflects its small package size and premium positioning.
Thermal Performance and Conductivity
At 12.5 W/mK, this is the highest-rated conductivity among mainstream non-conductive pastes covered on this site, and it holds the top spot in independent multi-paste benchmarking for exactly this category. In direct three-way comparison against Arctic MX-6 and Noctua NT-H2, all three landed within a genuinely tight 0.3°C to 1.4°C range depending on the specific test, meaning Kryonaut's real-world advantage, while measurable and real, is modest rather than dramatic for most builds.
Compound Type and Composition
As a silicone-based compound, Kryonaut stays fully non-conductive, avoiding the short-circuit risk of metallic or liquid-metal pastes while still achieving conductivity numbers that compete with, and in controlled testing sometimes exceed, both carbon-based and metal-oxide alternatives.
Application and Consistency
The 1g tube size, enough for two to three applications, reflects this paste's positioning as a premium, occasional-use product rather than a bulk household staple, appropriate for enthusiasts who repaste periodically for benchmarking or seasonal maintenance rather than needing a large reserve on hand.
Electrical Safety
Fully non-conductive despite its high conductivity rating, Kryonaut carries none of the short-circuit risk that liquid-metal compounds require careful handling to avoid, making it safe for standard application even at this premium performance tier.
Longevity and Pump-Out Resistance
While specific long-term longevity figures are less prominently marketed for Kryonaut than for Arctic's MX-6 or Noctua's NT-H2, its premium silicone-based formulation is built for the enthusiast and overclocking market, where periodic repasting during benchmarking sessions or hardware changes is common practice regardless of a given paste's maximum service life.
Comparison to Sibling Products
Against Arctic MX-6, covered elsewhere on this site, independent testing found the performance gap between the two paste-thin enough to fall within normal measurement variance for most real-world use, meaning MX-6's considerably lower price makes it the smarter default for most builders, with Kryonaut's edge showing up specifically under the most demanding, sustained high-TDP loads. Against Thermal Grizzly's own Conductonaut liquid metal compound, also covered elsewhere on this site, Kryonaut trades away that product's much higher raw conductivity specifically to remain non-conductive and safe for standard application without the precision and experience liquid metal demands.
Who This Paste Is Actually For
**Extreme overclockers and high-TDP flagship CPU builds.** Current guides specifically single this paste out for chips like an Intel Core i9-14900K under sustained heavy load. **Enthusiasts who repaste periodically and want the strongest safe option available each time.** The small tube size suits this occasional-use pattern. **Not for casual or mainstream builds.** Arctic MX-6, covered elsewhere on this site, delivers performance within a fraction of a degree at a considerably lower price for typical use. **Not for buyers wanting a large-volume tube for multiple future applications.** The 1g size is built for premium, occasional use rather than bulk supply.
Specifications
| Brand | Thermal Grizzly |
|---|---|
| Model | Thermal Grizzly Kryonaut , Kryonaut |
| Compound Type | Silicone-Based |
| Thermal Conductivity | 12.5 W/mK |
| Electrical Conductivity | Non-Conductive |
| Package Size | 1g / 5.55g / 11.1g tubes |
| Recommended Use | High-end CPU/GPU (including overclocking) |
| Reapplication Interval | 1-2 years typical |
| Safety Notes | None |
Expert Review
Rated by the Consumercarts editorial team, not by users
Best for
- Extreme overclockers and high-TDP flagship CPU builds. Current guides specifically single this paste out for chips like an Intel Core i9-14900K under sustained heavy load.
- Enthusiasts who repaste periodically and want the strongest safe option available each time. The small tube size suits this occasional-use pattern.
Not for
- Not for casual or mainstream builds. Arctic MX-6, covered elsewhere on this site, delivers performance within a fraction of a degree at a considerably lower price for typical use.
- Not for buyers wanting a large-volume tube for multiple future applications. The 1g size is built for premium, occasional use rather than bulk supply.