Coollaboratory

Coollaboratory Liquid Extreme

Expert rating7.6 / 10

View on CoollaboratoryView on coollaboratory.com

Compound Type:: Liquid Metal
Electrical Conductivity:: Conductive

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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: Coollaboratory Last updated: 2026-10-06

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Coollaboratory Liquid Extreme Review

Coollaboratory Liquid Extreme is Coollaboratory's 100% metal, gallium-based liquid metal thermal compound for delidded and high-end CPU and GPU cooling.

Liquid Extreme is Coollaboratory's paste-like liquid metal: 100% metal, no silicone or oil carrier, and a creamier consistency than classic liquid metal that Coollaboratory says can fill larger gaps. Coollaboratory's own site does not print a W/mK figure; retailer listings quote 41 W/mK. It is electrically conductive and must never touch aluminum, so it belongs on nickel-plated copper in delidded CPUs or carefully masked GPU dies. The kit holds about 0.15ml, roughly 1g, plus a cleaning cloth. We recommend it for experienced builders only. First-timers should use a non-conductive paste like Thermal Grizzly Kryonaut instead.

Thermal Performance and Conductivity

Coollaboratory's site describes "excellent thermal conductivity" but does not print a figure. Retailer listings such as Overclockers UK quote 41 W/mK, which we have not seen on a Coollaboratory datasheet.

What matters more is the class: as a metal alloy, it conducts heat far better than any grease in our catalog, and that is the reason to accept its risks on a delidded CPU.

Compound Type and Composition

Coollaboratory says Liquid Extreme is made of 100% metal with no silicones or oils as a carrier. It is a gallium-based alloy with a creamy, paste-like consistency rather than the free-flowing bead of older liquid metals. The exact alloy is not published.

Application and Consistency

The kit contains about 0.15ml, roughly 1g, plus a cleaning cloth. Coollaboratory says it applies quickly without pressing on the CPU contact surface and can fill larger gaps than its earlier liquid metals. Use a thin, even layer and mask nearby SMD components before you start.

Electrical Safety

Liquid Extreme is electrically conductive. A stray drop on exposed components can short them, so liquid metal on GPU dies needs careful masking. It is suitable for copper, silver and nickel, but Coollaboratory states it "may not be exposed to aluminium": gallium attacks aluminum. Check both the IHS and the cooler base before applying.

Longevity and Pump-Out Resistance

Coollaboratory states it does not dry out, can be stored almost indefinitely and stays easy to remove after prolonged use. Liquid metal does not pump out like grease, but bare copper can absorb gallium over time, which is why nickel-plated surfaces are the safer pairing. No reapplication interval is published.

Comparison to Alternatives

Against Coollaboratory Liquid Pro and Liquid Ultra in our catalog, Liquid Extreme is the newer, paste-like formula aimed at easier handling. Against Thermal Grizzly Conductonaut (0.0021 Pa s, 6.24 g/cm3) and Alphacool Eisfrost Xtreme, it competes as a more spreadable option.

We'd pick Liquid Extreme over Liquid Pro for a first liquid metal job on a delidded CPU, and Conductonaut where documentation matters most.

Our verdict

Reviewed by Burooj Alam. Rated by us, not by users.

Expert rating7.6 / 10

A straightforward 100% metal TIM from an established liquid-metal specialist, performance-focused rather than beginner-friendly.

Best for

Delidded CPUs with nickel-plated copper heatspreaders and coolers
Experienced builders wanting a more spreadable liquid metal than Liquid Pro
High-end GPU direct-die cooling with careful masking

Not for

Any aluminum cooler, heatspreader or cold plate
First-time builders or anyone uncomfortable masking components
Laptops or GPUs where a spill could reach exposed components unnoticed

Specifications

What these specs mean

Identity and form

Brand	Coollaboratory
Model	Liquid Extreme

Thermal performance

Conductivity Source	https://www.overclockers.co.uk/coollaboratory-liquid-extreme-1g-cleaning-set-th-019-cl.html

Electrical and board risk

Paste Segment	Liquid Metal

Application

Viscosity	100 Pa-s

Compound Type	Liquid Metal
Thermal Conductivity	41 W/mK (retailer-quoted; Coollaboratory prints no figure)
Electrical Conductivity	Conductive
Package Size	About 0.15ml (roughly 1g) kit with cleaning cloth
Recommended Use	High-end CPU/GPU, Delidded-Direct-Die
Reapplication Interval	Multi-year lifespan once applied; not intended for frequent reapplication
Safety Notes	Gallium-based liquid metal alloy. Will alloy with and corrode bare aluminum on contact, so never use it on aluminum heatsinks, cold plates or aluminum dies/IHS. Use only on nickel-plated copper or protected surfaces, avoid skin and eye contact, and contain spills immediately.

FAQs

Can I use Coollaboratory Liquid Extreme on an aluminum cooler?

No. Coollaboratory states it may not be exposed to aluminium. Use it only on copper, silver or nickel-plated surfaces.

Is Liquid Extreme electrically conductive?

Yes. It is 100% metal, so any drop that reaches exposed components can short them. Mask SMD parts around the die before applying.

How is Liquid Extreme different from Liquid Pro and Liquid Ultra?

Coollaboratory describes Liquid Extreme as a creamier, paste-like liquid metal that is easier to apply and can fill larger gaps. Liquid Pro and Liquid Ultra are its older liquid metal formulas.

How much is in a Liquid Extreme kit?

About 0.15ml, which Coollaboratory equates to roughly 1g, plus a cleaning cloth and instructions.

Does Liquid Extreme dry out?

Coollaboratory says it does not dry out and can be stored almost indefinitely. On bare copper, gallium alloys can be absorbed into the surface over time, so nickel-plated coolers hold up better.