Coollaboratory Liquid Ultra
- Model:
- Coollaboratory Liquid Ultra
- Compound Type:
- Liquid Metal
- Thermal Conductivity:
- ~38.4 W/mK (commonly cited
- Electrical Conductivity:
- Conductive
- Package Size:
- 1g syringe with cleaning kit
- Recommended Use:
- Delidded-Direct-Die (long-term stability)
- Reapplication Interval:
- Verify manufacturer-rated interval
- Safety Notes:
- Liquid metal: electrically conductive
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Manufacturer: Coollaboratory Last updated: September 10, 2026
Coollaboratory Liquid Ultra (Liquid Metal/Conductive/Commonly Cited ~38.4 W/mK/Better Long-Term Adhesion) Review
Liquid Ultra is Coollaboratory's other liquid metal option, and it's the one enthusiast forums recommend when someone asks "which one won't degrade on me." Lower conductivity than its own sibling Liquid Pro, but better wetting and adhesion to nickel and copper surfaces, which in practice means it tends to hold up better over the long haul.
Liquid Ultra is Coollaboratory's other liquid metal option, and it's the one enthusiast forums recommend when someone asks "which one won't degrade on me." Lower conductivity than its own sibling Liquid Pro, but better wetting and adhesion to nickel and copper surfaces, which in practice means it tends to hold up better over the long haul.
Thermal Performance and Conductivity
Commonly cited around 38.4 W/mK, roughly half of Liquid Pro's claimed number and well below Conductonaut's 73. This isn't the pick if raw conductivity is your only criterion, it's the pick if you want a liquid metal that stays put and performs consistently for the long term.
Compound Type and Composition
Gallium-based, same category as Liquid Pro and Conductonaut, but formulated for better adhesion rather than the highest possible number.
Application and Consistency
Ships with a cleaning kit like Liquid Pro, same careful-application expectations apply.
Electrical Safety
Conductive, same short-circuit risk as any liquid metal. No shortcuts here regardless of which Coollaboratory product you pick.
Longevity and Pump-Out Resistance
This is Liquid Ultra's actual selling point. Better adhesion to nickel and copper means less migration and more consistent performance over time compared to Liquid Pro, according to the overclocking community's long-running comparisons between the two.
Comparison to Sibling Products
Against Coollaboratory's own Liquid Pro, covered elsewhere on this site, Ultra gives up a real chunk of peak conductivity for meaningfully better long-term stability, the right trade for most builders who aren't specifically chasing a benchmark record. Against Thermal Grizzly Conductonaut, Ultra rates lower on conductivity but the two occupy a similar "stable, not the highest number" niche.
Who This Compound Is Actually For
Winner for: delidded CPU builds that need to stay stable for years, not just for one benchmark run.
Long-term delidded CPU installs where reapplying isn't something you want to plan for.
Builders who'd rather have consistent performance than the single highest number on the spec sheet.
Not for: Extreme benching sessions chasing the absolute lowest possible temperature, Liquid Pro's higher ceiling wins there.
Not for: Anyone new to liquid metal who hasn't handled the application and safety precautions before.
Pending Verification
Thermal Conductivity: ~38.4 W/mK is commonly cited; confirm against Coollaboratory's current datasheet.
Specifications
Identity and form
| Brand | Coollaboratory |
|---|---|
| Model | Coollaboratory Liquid Ultra , Liquid Ultra |
| Compound Type | Liquid Metal |
|---|---|
| Thermal Conductivity | 38.4 W/mK |
| Electrical Conductivity | Conductive |
| Package Size | 1g syringe with cleaning kit |
| Recommended Use | Delidded-Direct-Die (long-term stability) |
| Reapplication Interval | Verify manufacturer-rated interval |
| Safety Notes | Liquid metal: electrically conductive; do not use near exposed aluminum or bare-die edges |
| Paste Segment | Liquid Metal |
Expert Review
Reviewed by Burooj Alam. Rated by us, not by users.
Best for
- Long-term delidded CPU installs where reapplying isn't something you want to plan for.
- Builders who'd rather have consistent performance than the single highest number on the spec sheet.
Not for
- Extreme benching sessions chasing the absolute lowest possible temperature, Liquid Pro's higher ceiling wins there.
- Anyone new to liquid metal who hasn't handled the application and safety precautions before.
FAQs
What are the key specifications of the Coollaboratory Liquid Ultra (Liquid Metal/Conductive/Commonly Cited ~38.4 W/mK/Better Long-Term Adhesion)?
The Coollaboratory Liquid Ultra (Liquid Metal/Conductive/Commonly Cited ~38.4 W/mK/Better Long-Term Adhesion) is a thermal paste from Coollaboratory. Key specs: Compound Type Liquid Metal, Thermal Conductivity 38.4, Electrical Conductivity Conductive, Package Size 1g syringe with cleaning kit, Recommended Use Delidded-Direct-Die (long-term stability).
Will the Coollaboratory Liquid Ultra (Liquid Metal/Conductive/Commonly Cited ~38.4 W/mK/Better Long-Term Adhesion) work with my current setup?
The Coollaboratory Liquid Ultra (Liquid Metal/Conductive/Commonly Cited ~38.4 W/mK/Better Long-Term Adhesion) lists Thermal Conductivity is 38.4. Check that against the hardware you already own before buying, since this is the field that most often decides whether a part fits.
Who is the Coollaboratory Liquid Ultra (Liquid Metal/Conductive/Commonly Cited ~38.4 W/mK/Better Long-Term Adhesion) best suited to?
It suits long-term delidded cpu installs where reapplying isn't something you want to plan for., builders who'd rather have consistent performance than the single highest number on the spec sheet..
What are the drawbacks of the Coollaboratory Liquid Ultra (Liquid Metal/Conductive/Commonly Cited ~38.4 W/mK/Better Long-Term Adhesion)?
It is a poor fit for extreme benching sessions chasing the absolute lowest possible temperature, liquid pro's higher ceiling wins there., anyone new to liquid metal who hasn't handled the application and safety precautions before..
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