Thermal Heatsink Plaster Paste – CPU GPU LED IC Chip Cooler

Keep Your Electronics Running Cool with Thermal Heatsink Plaster

This high-performance thermal conductive heatsink plaster is the go-to solution for anyone who needs reliable heat dissipation for CPUs, GPUs, RAM chips, LEDs, transistors, and more. Its one-component, room-temperature-vulcanizing silicone formula bonds fast, transfers heat efficiently, and stays stable across a wide temperature range — making it perfect for both DIY enthusiasts and professional technicians.

Made in Mainland China.

Key Features

• Excellent Thermal Conductivity: 0.671 W/m-K ensures effective heat transfer between components and heat sinks.
• Fast Setting Time: Cures in as little as 3 minutes at 25°C — no long wait times.
• Strong Bonding Strength: Up to 25 kg adhesion for a secure, lasting hold.
• Wide Temperature Range: Performs reliably from -60°C to 200°C, with short-term tolerance up to 300°C.
• Vacuum Sealed Packaging: Pen-style pack with airtight outer vacuum bag prevents oxidation and drying, extending shelf life.
• REACH Certified: Meets international chemical safety standards — no high-concern substances.
• Solvent-Free Formula: Safe for use around sensitive electronics and electrical components.
• Insulating & Non-Conductive: Insulation factor of 5.1 — safe for direct application near circuit components.

Technical Specifications

• Capacity: 5g per piece (7ml pen)
• Thermal Conductivity: 0.671 W/m-K
• Thermal Impedance: 0.06
• Setting Time: 3 min @ 25°C
• Bonding Strength: 25 kg
• Insulation Factor: 5.1
• Dissipation Coefficient: 0.005
• Melting Capacity: 0 @ 200°C/24 Hours
• Evaporation Capacity: 0.001% @ 200°C/24 Hours
• Operating Range: -60°C to 200°C (short-term up to 300°C)
• Packing Style: Pen Style
• Certification: REACH

Where to Use It

• CPU & GPU (graphics card chip) to heat sink gap filling
• LED chips and LED heat sinks
• High-power transistors and aluminum heat spreaders
• Silicon-controlled rectifiers and diode contact points
• IC chips, RAM modules, VGA cards
• Instrumentation and electrical appliance insulation/packaging

How to Apply

1. Clean the component surfaces thoroughly with isopropyl alcohol and allow to dry completely. Do not use detergent.
2. Squeeze out the appropriate amount from the pen-style applicator.
3. Spread evenly on the component surface with a recommended coating thickness of 0.1–0.5 mm (thinner is better).
4. Press surfaces together immediately and allow to cure (3 minutes at 25°C under normal humidity).
5. Replace the cap immediately after use to prevent drying.

What's in the Box

• 1x Heatsink Plaster (Pen Style, 5g)
• Available in 1–5 piece quantities

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For more information on safe handling of chemical adhesives and electronic materials, refer to guidance from the U.S. Environmental Protection Agency (EPA) – Safer Choice Program.

Frequently Asked Questions

Q: What is thermal heatsink plaster used for?

A: Thermal heatsink plaster (also known as thermal adhesive or conductive heatsink adhesive) is used to bond heat sinks directly to electronic components such as CPUs, GPUs, RAM chips, LEDs, transistors, and ICs. It simultaneously provides mechanical adhesion and transfers heat away from hot components, helping to lower operating temperatures and extend the life of your electronics.

Q: Is this thermal paste electrically conductive or insulating?

A: This heatsink plaster is thermally conductive but electrically insulating, with an insulation factor of 5.1. This means it safely transfers heat while preventing short circuits — making it ideal for direct application near sensitive circuit board components, LEDs, and IC chips.

Q: How long does the thermal heatsink plaster take to cure?

A: The surface setting time is approximately 3 minutes at 25°C under normal humidity conditions. Higher temperatures and humidity accelerate the curing process. Full bonding strength (25 kg) is achieved after complete curing. Keep the cap on the pen applicator when not in use to prevent premature drying.

Q: How does this compare to standard thermal paste (grease)?

A: Unlike standard thermal paste (grease), which requires a mechanical clamp or heatsink clip to hold components together, this thermal heatsink plaster is adhesive — it bonds the heatsink directly to the component. This makes it ideal for LEDs, RAM chips, and other components where a clip or bracket isn't practical. Note that because it bonds permanently, repositioning after curing is difficult.