Thermal paste QOLTEC 51637 — heat-conductive compound for CPUs and GPUs

QOLTEC 51637 is a thermally conductive paste engineered to improve heat transfer between CPUs, GPUs and their cooling solutions. The compound fills microscopic gaps and surface irregularities between a processor and the heatsink, improving contact and enabling more consistent dissipation of heat. It is suitable for desktop and laptop processors as well as other electronic components that benefit from a stable thermal interface.

Advantages

The paste combines high thermal conductivity with electrical insulation, allowing effective heat transfer without creating conductive paths. It spreads easily to fill micro-gaps, is simple to apply, and maintains its properties during long-term use. These characteristics reduce the need for frequent reapplication while helping to stabilise operating temperatures.

Suitable for

• Desktop CPU and GPU cooling assemblies
• Laptop processor and graphics module thermal interfaces
• Small electronic components and power ICs that require improved heat transfer
• Repair, maintenance and system upgrades where improved thermal contact is needed

Key specifications

• Thermal compound type: heat-conductive paste
• Primary properties: high thermal conductivity and electrical insulation
• Application form: spreadable paste suitable for manual application
• Compatibility: designed for use between processors and heatsinks on desktop and laptop platforms
• Durability: long-lasting performance without frequent replacement

How to use

Before application, power off the system and disconnect from mains. Clean both the processor surface and heatsink base from old thermal compound, dust and oils using isopropyl alcohol or a suitable cleaning agent and a lint-free cloth. Apply a small, pea-sized amount of QOLTEC 51637 to the centre of the processor die or IHS, then mount the heatsink and secure it according to the manufacturer’s instructions so the paste spreads evenly. For laptops or constrained spaces, use an appropriate thin layer and avoid excessive pressure that could squeeze out the compound. Allow the system to reach normal operating conditions to settle the thermal interface.

Usage recommendations

Use the paste sparingly — a thin, even layer ensures best thermal contact. Avoid contact with exposed electrical connectors and follow antistatic precautions. Replace the paste during major maintenance or when removing the heatsink to ensure consistent thermal performance.