Quick answer: For most people in 2026, the best thermal paste for low temperature is the Thermal Grizzly Kryonaut (1g) — our #1 rated choice. See the full ranked comparison, alternatives and buying advice below.
Top Thermal Paste Low Temperature Picks for 2026
Here are our current top thermal paste low temperature picks, compared on real Amazon owner reviews, price, and features. Live prices update below.
If your goal is the lowest possible temperatures, the most important number on any thermal paste is its thermal conductivity, measured in watts per meter-kelvin (W/mK): the higher the figure, the more heat the paste transfers from your chip to the cooler. We have ordered this guide accordingly, leading with the highest-conductivity compound and working down, so the picks most likely to shave off degrees come first. Every paste here is a quality, widely-trusted choice — but they are not all equal for raw temperature performance, and we say where each one really lands.
One honest clarification up front: none of these are liquid-metal compounds. Liquid metal can drop temperatures further still, but it is electrically conductive, can be risky to apply, and must never touch bare aluminium — so for the vast majority of users a top ceramic or carbon-based paste is the safer, more sensible route to low temps, which is what this list focuses on. Prices run from around $5 to around $9. Below is an at-a-glance comparison ordered by cooling performance, then a closer look at each paste and a buyer’s guide on conductivity, application, longevity and the liquid-metal-versus-ceramic decision.
Best Thermal Paste for Low Temperature at a Glance (Highest Conductivity First)
| Thermal Paste | Best For Low Temps | Standout Trait | Approx Price |
|---|---|---|---|
| Thermal Grizzly Kryonaut (1g) | Lowest temps overall (top W/mK) | ~12.5 W/mK, enthusiast favorite | around $9 |
| ARCTIC MX-4 (4g) | Best all-round low-temp value | High conductivity, non-conductive | around $9 |
| ARCTIC MX-4 (4g, incl. spatula) | Easy application + value | Same MX-4, with spatula | around $5 |
| Noctua NT-H1 (3.5g) | Reliable, forgiving low temps | Pro-grade, easy to apply | around $9 |
| Corsair TM30 Performance | Budget low-impedance pick | Ultra-low thermal impedance | around $8 |
| Arctic Silver 5 (3.5g) | Classic high-end (silver-based) | Silver-loaded, long curing | around $8 |
1. Thermal Grizzly Kryonaut — 1 Gram — Extremely High Performance Thermal Paste
Prime Thermal Grizzly Kryonaut - 1 Gram - Extremly High Performance Thermal Paste - for Demanding Applications and Overclocking CPU/GPU/PS4/PS5/Xbox
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For the lowest temperatures, the Thermal Grizzly Kryonaut is the standout pick on this list, which is exactly why we lead with it. It is rated at roughly 12.5 W/mK — among the highest thermal conductivities of any non-liquid-metal paste — and is the long-time darling of overclockers and benchmarkers chasing every last degree. At around $9 for 1g it is the enthusiast’s choice when peak cooling is the priority.
This is the paste for anyone whose explicit goal is the coldest chip possible without resorting to liquid metal: heavy overclocking, a high-wattage CPU, or a GPU repaste where you want maximum heat transfer. Kryonaut applies cleanly, performs consistently, and is engineered to resist drying out under sustained high temperatures. If ‘low temperature’ is the literal title of your search and you want the most effective safe paste here, the Kryonaut is the one to buy.
Pros: Top-tier ~12.5 W/mK conductivity, the low-temperature standout, overclocker favorite, applies cleanly.
Cons: Small 1g tube for the price; non-curing formula can need reapplication over years of extreme heat.
2. ARCTIC MX-4 (4 g) — Premium Performance Thermal Paste for All Processors
Prime ARCTIC MX-4 (4 g) - Premium Performance Thermal Paste for All Processors (CPU, GPU - PC, PS4, Xbox), Very high Thermal Conductivity, Long Durability, Safe Application, Non-Conductive, Non-capacitive
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The ARCTIC MX-4 is the best all-round low-temperature value, and a deserving second pick. It delivers high thermal conductivity that lands close behind the very best pastes, in a carbon-based, completely non-conductive and non-capacitive formula that is impossible to short out your hardware with. The generous 4g tube at around $9 covers many applications, making it superb value for a paste this capable.
This is the paste for the builder who wants temperatures near the top of the chart with zero application anxiety. Because MX-4 is non-conductive, a little spillage onto pins or traces is harmless, and it spreads easily without long curing times — it performs at its best immediately. For CPUs and GPUs alike, across years of reliable service, MX-4 is the safe, high-performing default for low temps, and the large tube means you will not run out after one build.
Pros: High conductivity near the top, totally non-conductive and safe, large 4g tube, no cure time.
Cons: A touch behind Kryonaut at the extreme end; thicker consistency takes a firmer spread.
3. ARCTIC MX-4 (incl. Spatula, 4 g) — Premium Performance Thermal Paste
Prime ARCTIC MX-4 (incl. Spatula, 4 g) - Premium Performance Thermal Paste for All Processors (CPU, GPU - PC), Very high Thermal Conductivity, Long Durability, Safe Application
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This is the same excellent ARCTIC MX-4 compound as above, bundled with an application spatula and often found at an even lower price — around $5. The thermal performance is identical: high conductivity, fully non-conductive, and the same low-temperature credentials. The difference is purely the included spreader, which makes laying down an even layer easier, especially for first-timers.
This is the pick for someone buying their first tube, or doing a build where a perfectly even spread matters and they would rather not improvise with a card or a fingertip. You get MX-4’s proven low temperatures and rock-solid safety, plus the convenience of the spatula, frequently for less money than the standard tube. If value and ease of application together are your priority, this bundle is the smart way to buy MX-4.
Pros: Identical low-temp MX-4 performance, includes a spatula for even application, frequently the cheapest MX-4.
Cons: Spatula spread still needs care; same thicker consistency as standard MX-4.
4. Noctua NT-H1 3.5g, Pro-Grade Thermal Compound Paste
Prime Noctua NT-H1 3.5g, Pro-Grade Thermal Compound Paste (3.5g)
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The Noctua NT-H1 is the reliable, forgiving choice for strong low temperatures. It is a pro-grade compound trusted across countless builds, delivering excellent cooling that sits competitively with the best mainstream pastes, while being famously easy and safe to apply. At around $9 for 3.5g it is a dependable, no-drama option.
This is the paste for the builder who values consistency and ease over chasing the absolute lowest benchmark temperature. NT-H1 is non-conductive and non-curing, spreads smoothly, performs immediately, and is highly tolerant of imperfect application — making it ideal for anyone who wants great temps without fuss. Backed by Noctua’s stellar reputation, it is one of the safest ways to get genuinely low temperatures with minimal risk of a botched mount.
Pros: Excellent, consistent cooling, very easy and forgiving to apply, non-conductive, trusted Noctua quality.
Cons: Not the outright coldest at the extreme end; smaller 3.5g tube than MX-4’s 4g.
5. Corsair TM30 Performance Thermal Paste — Ultra-Low Thermal Impedance
Prime Corsair TM30 Performance Thermal Paste | Ultra-Low Thermal Impedance CPU/GPU | 3 Grams|w/applicator, Silver for Desktop
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The Corsair TM30 is the budget-minded low-impedance pick. Corsair designed it with an ultra-low thermal impedance formula intended to transfer heat efficiently from CPUs and GPUs, and at around $8 it is a sensible, affordable option from a well-known brand. It will not top the conductivity chart, but it is a solid performer for everyday cooling.
This is the paste for a mainstream build or a cooler swap where you want dependable temperatures from a familiar name without overthinking it. The ultra-low thermal impedance helps it move heat effectively for typical gaming and productivity loads, and application is straightforward. For users who are not chasing extreme overclocks but still want a capable, reasonably priced paste, the TM30 fills the role well — just note it sits below the Kryonaut and MX-4 for outright low-temperature performance.
Pros: Ultra-low thermal impedance design, affordable, trusted Corsair brand, fine for mainstream builds.
Cons: Lower conductivity than the top picks here; not the choice for extreme overclocking.
6. Arctic Silver 5 (AS5-3.5G) Thermal Paste, Silver-Loaded
Prime Arctic Silver 5 AS5-3.5G Thermal Paste,Black, Grey
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The Arctic Silver 5 is the classic high-end paste, and an honest mention of its quirks is owed. It is a silver-loaded compound that delivers strong cooling and has been a staple for decades. Two caveats matter for low-temp shoppers: it is very slightly electrically capacitive (so keep it off pins and traces), and it requires a curing/break-in period before it reaches its best temperatures. At around $8 for 3.5g it remains a respected option.
This is the paste for the experienced builder who knows AS5’s character and applies it carefully. Once cured, it cools very well, and its silver-loaded formula earned its long-standing reputation. But for a first-timer or anyone who wants the lowest temps immediately and with zero application risk, the non-conductive Kryonaut, MX-4 or NT-H1 above are easier recommendations. AS5 rewards a steady hand and a little patience rather than convenience.
Pros: Proven silver-loaded compound, strong cooling once cured, decades of trusted use.
Cons: Slightly capacitive — keep off pins; needs a curing period; non-conductive rivals are easier and as cold or colder.
How to Choose Thermal Paste for the Lowest Temperatures
The headline metric for low temperatures is thermal conductivity in W/mK — the higher, the better the paste moves heat from your chip to the cooler. That is why we ordered this guide with the Thermal Grizzly Kryonaut (around 12.5 W/mK) first: among non-liquid-metal pastes it is one of the most conductive you can buy, with ARCTIC MX-4 close behind. If your single goal is the coldest possible chip without liquid metal, prioritise conductivity above all and the top of this list is where you should look.
Now the liquid-metal-versus-ceramic decision, told straight. Liquid metal (such as gallium-based compounds) can lower temperatures further than any paste here — but it is electrically conductive, can permanently stain or corrode, must never contact bare aluminium, and a spill can kill components. None of our picks are liquid metal, by design: for almost everyone, a top ceramic or carbon-based paste delivers excellent low temps with none of that risk. Only consider liquid metal if you are experienced, your cooler is compatible, and you accept the hazards.
Electrical safety should shape your choice as much as raw performance. ARCTIC MX-4 and Noctua NT-H1 are completely non-conductive and non-capacitive, so a stray smear cannot short anything — ideal for beginners and anyone who wants peace of mind. Arctic Silver 5, by contrast, is silver-loaded and very slightly capacitive, so it demands a careful, contained application away from pins and traces. If you are not confident with a precise application, favour a non-conductive paste from this list.
Finally, weigh longevity, application and value for how you actually build. Most of these are non-curing and perform at their best straight away (MX-4, NT-H1, Kryonaut), while Arctic Silver 5 needs a break-in period to reach peak cooling. A larger tube like MX-4’s 4g is better value if you repaste often or do GPUs as well as CPUs, whereas a 1g Kryonaut tube suits a single high-stakes application. Decide whether you want the outright lowest temperature, the safest easy application, or the best value — then pick the paste above that matches that priority, and apply a thin, even layer for the best result.
Frequently Asked Questions
Which thermal paste gives the lowest temperatures here?
The Thermal Grizzly Kryonaut, which is why we listed it first. At roughly 12.5 W/mK it has one of the highest thermal conductivities of any non-liquid-metal paste, making it the go-to for overclockers chasing the coldest possible chip. ARCTIC MX-4 follows closely and is the better value if you want near-top performance with a larger tube and a totally non-conductive, beginner-safe formula.
Should I use liquid metal instead for even lower temperatures?
Only if you are experienced and accept the risks. Liquid metal can drop temps further than any paste in this guide, but it is electrically conductive, can stain and corrode, and must never touch bare aluminium — a spill can destroy hardware. None of our picks are liquid metal on purpose: for almost everyone, a top ceramic or carbon paste like Kryonaut or MX-4 is the safer route to low temperatures.
Is the silver in Arctic Silver 5 electrically conductive / risky?
Arctic Silver 5 is silver-loaded and very slightly electrically capacitive, so you must keep it off CPU pins, surrounding traces and contacts. It is not as dangerous as liquid metal, but it is less forgiving than the non-conductive ARCTIC MX-4 or Noctua NT-H1. It also needs a curing period to reach its best temperatures, so it rewards a careful, experienced application.
How often should I reapply thermal paste to keep temperatures low?
For most quality non-curing pastes like MX-4, NT-H1 and Kryonaut, every few years is plenty unless you remove the cooler. If you notice temperatures creeping up over time, or you take the cooler off for any reason, clean off the old paste and apply a fresh thin, even layer. Repasting is also a worthwhile, cheap way to lower temperatures on an older PC.
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