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Best Silicon Grease Under $100 (2026)

We ranked products under $100 by thermal conductivity type, user ratings, formulation safety, applicator/package convenience, and an aggregated value score

This roundup covers silicon and liquid-metal thermal greases suitable for CPU and GPU cooling under $100, selected for thermal performance, conductivity type, and user value. Picks were chosen by comparing thermal conductivity features, formulation (silicone vs liquid-metal), user ratings, and overall value score

Top Picks

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    Hydronaut thermal paste for high-heat cooling

    Hydronaut thermal paste for high-heat cooling

    Thermal Grizzly • ★ 3.9/5 • Mid-Range

    Hydronaut thermal paste for CPU/GPU cooling with precise syringe application. Supports overclocking with strong thermal conductivity. Customers note improved temperatures and good value

    • high-performance thermal conductivity
    • easy application syringe
    • overclocking support
    Check current price on Amazon →
  2. 2
    Thermal Grizzly Conductonaut - 5g combo + applicators

    Thermal Grizzly Conductonaut - 5g combo + applicators

    Nabob Deals • ★ 3.9/5 • Mid-Range

    Thermal Grizzly Conductonaut liquid metal thermal paste for cooling CPUs and GPUs. High thermal conductivity with extended stability, but cannot be used on aluminum. Customers note notable temperature reduction and mixed ease of spread

    • liquid metal formulation
    • includes extra applicators
    • immediate temperature reduction
    Check current price on Amazon →
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Buying Guide

Thermal conductivity matters

Choose a compound with higher thermal conductivity for demanding CPU/GPU workloads; products here list high-conductivity and metal-based formulations for better heat transfer

Silicone vs liquid-metal

Silicone pastes are electrically safe and easier to apply, while liquid-metal (indium-rich) options offer higher performance but require careful handling and metal-compatible heatsinks

Check compatibility with heatsink materials

Avoid liquid-metal on aluminum surfaces and confirm compatibility with your cooler; many metal-thermal-conductive compounds are intended for copper or nickel-plated surfaces

Package size and applicators

Consider multi-pack or included applicators when applying to multiple components; several offerings combine small syringes and applicators for precise application

Balance cost and value score

For under-(price varies) options, weigh user ratings and value score against price—high-rated thermal pastes and liquid-metal compounds often provide the best performance per dollar