Thermal Grizzly Duronaut
Expert rating9 / 10
- Model:
- Thermal Grizzly Duronaut
- Compound Type:
- Aluminum/Zinc-Oxide Hybrid (Non-Conductive)
- Electrical Conductivity:
- Non-Conductive
- Package Size:
- 2g / 6g / 30g tubes
- Recommended Use:
- High-end CPU/GPU (Long-Term Stability Focus)
- Reapplication Interval:
- Long-term stability rated
- Safety Notes:
- None
Consumercarts is reader-supported. Learn more
Disclaimer: The price and specification of the given product may differ from the actual product. Please confirm on the retailer's website before buying.
Manufacturer: Thermal Grizzly Last updated: September 25, 2026
Thermal Grizzly Duronaut Review
Thermal Grizzly Duronaut is the brand's newest flagship thermal paste (2025), built with aluminum microparticles and zinc oxide nanoparticles specifically to resist the pump-out and dry-out that eventually affect conventional pastes. It is fully non-conductive and non-curing, and was named the top-ranked thermal paste overall in Tom's Hardware's 2026 testing.
Thermal Grizzly Duronaut is the brand's newest flagship thermal paste (2025), built with aluminum microparticles and zinc oxide nanoparticles specifically to resist the pump-out and dry-out that eventually affect conventional pastes. It is fully non-conductive and non-curing, and was named the top-ranked thermal paste overall in Tom's Hardware's 2026 testing.
Thermal Performance and Conductivity
Thermal Grizzly does not publish a W/mK conductivity figure for Duronaut, so it cannot be compared on that number alone. Independent testing tells the clearer story: Tom's Hardware ranked Duronaut as the top thermal paste overall in its 2026 roundup, ahead of long-standing leaders.
Compound Type and Composition
Duronaut uses an aluminum microparticle and zinc oxide nanoparticle hybrid formulation, engineered specifically to resist pump-out and dry-out over time. It remains fully non-conductive, so it carries none of the short-circuit risk of liquid metal compounds.
Application and Consistency
Duronaut ships in 2g, 6g and 30g tubes with a spatula included. It is a non-curing paste, meaning it does not harden over time, which supports its long-term stability positioning.
Electrical Safety
Fully non-conductive and insulating, Duronaut is safe for standard CPU and GPU application without the handling precautions liquid metal demands.
Longevity and Pump-Out Resistance
Long-term stability is Duronaut's core design goal: the particle formulation is built to resist the pump-out and dry-out that degrade conventional pastes. Thermal Grizzly rates it for long-term use but does not publish a specific reapplication interval.
Who This Paste Is Actually For
High-end CPU and GPU builds where long-term stability matters. The formulation is specifically designed to resist pump-out and dry-out over years of thermal cycles.
Builders who want a top-ranked, safe, non-conductive paste. Named the top thermal paste overall in Tom's Hardware's 2026 testing.
Not for buyers who need a published conductivity figure. Thermal Grizzly does not list a W/mK number for Duronaut.
Our verdict
Reviewed by Burooj Alam. Rated by us, not by users.
Expert rating9 / 10
A current favorite among reviewers for long-term stability, with minimal pump-out even after extended use.
Best for
- High-end CPU and GPU builds where long-term stability matters; the formulation is specifically designed to resist pump-out and dry-out over years of thermal cycles.
- Builders who want a top-ranked, safe, non-conductive paste; named the top thermal paste overall in Tom's Hardware's 2026 testing.
Not for
- Buyers who need a published conductivity figure; Thermal Grizzly does not list a W/mK number for Duronaut.
Specifications
What these specs meanIdentity and form
| Brand | Thermal Grizzly |
|---|---|
| Model | Thermal Grizzly Duronaut , Duronaut |
Application
| Applicator Included | Spatula |
|---|
| Compound Type | Aluminum/Zinc-Oxide Hybrid (Non-Conductive) |
|---|---|
| Electrical Conductivity | Insulating |
| Package Size | 2g / 6g / 30g tubes |
| Recommended Use | High-end CPU/GPU (Long-Term Stability Focus) |
| Reapplication Interval | Long-term stability rated; no specific reapplication interval published by Thermal Grizzly |
| Safety Notes | None |