Cooler Master

Cooler Master RG-ICE1-TG15-R1 Ic-essential E1 Thermal Grease

Reliable, non-conductive thermal interface material that bridges the gap between heatsink and die without adding electrical risk.

$6.99*
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*Price sourced from Amazon.com. Last updated:Sep 14, 2026.Price and availability are subject to change — details.

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Overview

The Cooler Master IC Essential E1 is a gray silicone-based thermal compound positioned for builders who need reliable heat transfer between CPU or GPU and heatsink without the electrical risk of metal-particle pastes. The non-conductive, non-corrosive formulation means that application errors — overspread, accidental contact with socket area components — don't carry the risk of a short circuit that silver or liquid-metal compounds introduce. That safety profile makes it a sensible default for system integrators, first-time builders, and anyone servicing machines where precision application is difficult. The 1.5ml tube provides enough material for multiple applications, and the included cleanser and scraper make it a self-contained kit rather than requiring separate surface prep supplies.

Real-world thermal performance sits in the mid tier — a clear improvement over the pre-applied thermal pads that ship on budget coolers, and adequate for mainstream desktop CPUs and GPUs under normal and moderately overclocked workloads. Users running high-TDP processors on smaller coolers, or enthusiasts chasing the last degree of thermal headroom, will find more performance in higher-conductivity compounds, but the E1 is not designed to compete at that level. Its value is reliability and ease of use: it applies predictably, spreads evenly under cooler pressure, and won't damage adjacent components if the application isn't perfect. For a clean, low-drama thermal interface material for general builds, it delivers exactly what it promises.

Key Features

High Performance

Grey Edition

1.5ml

Specifications

Edition
Grey Edition
Volume
1.5ml

Frequently Asked Questions

Cooler Master specifies the E1 as high-performance but does not publish a precise W/m·K figure in the product documentation. In practice it performs as a mid-tier compound — meaningfully better than the pre-applied pads found on budget coolers, though enthusiast-grade compounds like those above 10 W/m·K will outperform it under sustained heavy load.
No — the IC Essential E1 is explicitly non-conductive and non-corrosive. Accidental spread onto capacitors or socket contacts near the die won't cause a short, which makes it a reasonable choice for less experienced builders who want a margin of safety during application.
1.5ml is enough for approximately 3–5 full CPU applications depending on die size and method. On a standard desktop CPU die, a pea-sized center application of 0.3–0.4ml spreads adequately under cooler pressure. Larger dies (HEDT platforms, some AMD Threadripper) will consume more per application.
Yes — the package includes a grease cleanser and a scraper, which are practical additions that lower the barrier for first-time application or re-application after a cooler swap. The cleanser helps remove cured residue cleanly from both the heatspreader and cooler base.
No manufacturer-specified longevity figure is published, but gray silicone-based compounds at this tier typically remain effective for 2–4 years under normal operating conditions. Watch for rising CPU thermals over time as the primary signal that reapplication is warranted.