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Silver thermal putty in a white syringe with grey cap

UPSIREN

UPSIREN U6 PRO Thermal Putty

SKU CH-8WPJ-AFMSX

High-performance thermal putty for GPU and IC cooling, fully cured with no dry-out, low viscosity for dispensing, and RoHS-compliant

Weight 10g

  • High thermal conductivity transfers heat rapidly from GPU or memory modules
  • Fully cured formula never dries out or bleeds oil over time
  • Natural tackiness ensures low contact resistance and stays in place on heatsinks
  • High compressibility fills uneven gaps completely, replacing thermal pads reliably
  • RoHS compliant and halogen free for use in regulated electronics environments

UPSIREN U6 PRO Thermal Putty

UPSIREN U6 PRO is a high-performance, fully cured thermal putty designed to replace thermal pads on GPUs, memory modules and other ICs. It features high thermal conductivity with natural tackiness and low contact resistance. The material does not dry out or bleed oil, ensuring long-term stability. It is RoHS compliant and halogen-free for safer use in sensitive electronics.

For GPU and IC rework needing gap filling

This putty suits builders replacing thermal pads on graphics cards, memory heatsinks, power supplies or automotive ECUs where a compressible, non-drying material is required. It is also suitable for automated dispensing or stencil printing in production or repair. It cannot be used as silicone grease on a CPU die, so buyers needing traditional CPU paste should look elsewhere.

Fully cured, non-drying formulation

Unlike conventional greases, U6-PRO remains fully cured and will not dry out or bleed oil over time. This eliminates pump-out and degradation risks in high-compression or vertical-mount applications. The material maintains consistent thermal contact and tackiness throughout the hardware lifecycle. This property is the key factor when choosing between putty and standard thermal paste.

How it compares

Measured against everything we stock in Thermal Paste, at today’s prices. Recalculated every night.

Price $9.99
Cheaper than about 70% of the 498 comparable items (median $12.99).

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Specifications

No published specifications for this item yet.

Other versions of this model

3 more in the same range

Questions about this item

Which UPSIREN U6 PRO package size should I pick for a GPU rework job?

Choose the smallest syringe that covers the die area you need to fill; U6 PRO is a fully cured putty that does not dry out, so leftover material stays usable for future repairs.

What does the “high thermal conductivity” claim mean once the putty is installed on a graphics card?

The putty conforms completely to microscopic gaps between the GPU die and heatsink, eliminating air pockets and delivering consistent heat transfer without the pump-out or oil bleed seen with traditional greases.

How does the RoHS-compliant, halogen-free formulation affect long-term reliability in a gaming rig?

It guarantees no banned substances leach out over thermal cycles, and the full-cured, non-drying nature prevents degradation, keeping contact resistance low for the life of the card.

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