# Thermal paste QOLTEC 51640 — heat sink compound, generic thermal interface material

**URL:** https://aio.lv/en/product--qoltec-51640--767833
**Data updated:** 2026-03-07 10:54 (EET)
**Category:** Thermal Paste
**Manufacturer:** QOLTEC
**Manufacturer code:** 51640
**Warranty:** 2 Years
**Availability:** Available for order
**Price:** 15.99 €
**Prices and availability valid until:** 2026-07-08 23:59
**Price without VAT (21%):** 13.21 EUR
**Can be purchased by legal entities:** Yes (invoice)
**Buy:** https://aio.lv/en/product--qoltec-51640--767833

## Delivery options

| Delivery method | Delivery time | Cost |
|---|---|---|
| Office pickup (2b. Kengaraga str., Riga, Latvia, LV-1063) | 30.06.2026 | free |
| Pickup points | 03.07.2026 | 1.99 EUR |
| Courier delivery to door | 03.07.2026 | 4.99 EUR |

## Summary description

QOLTEC 51640 is a heat sink compound (thermal paste) designed to fill microscopic gaps between processors or power components and heatsinks, improving thermal transfer. Supplied as a thermal interface material for use in CPUs, GPUs, power electronics and cooling assemblies, it facilitates efficient heat dissipation during operation.

## Long description

QOLTEC 51640 is a thermal paste formulated as a thermal interface material to improve heat transfer between electronic components and heatsinks. It fills microscopic gaps and surface irregularities between processors, GPUs, power devices and cooling bases to reduce thermal resistance and support stable temperature control during operation.
Advantages
The compound combines efficient thermal conductivity with electrical insulation, allowing safe use around sensitive circuits. It spreads easily and adheres well to metal and ceramic surfaces, enabling consistent thermal contact without frequent reapplication. The formulation maintains its performance over extended use and resists drying or degradation under normal operating conditions.
Suitable for
CPU and GPU cooling in desktop and laptop systems
Power electronics and MOSFET cooling assemblies
Heat sinks, cold plates and thermally conductive gaps in compact devices
Replacement or maintenance of thermal interfaces in servers and workstations
Key specifications
Form: paste / compound designed for thermal interface application
Thermal behavior: high thermal conductivity to improve heat transfer
Electrical properties: electrically insulating to reduce risk of short circuits
Compatibility: suitable for metal and ceramic heatsink surfaces and electronic package interfaces
Application properties: easy to spread with good adhesion, long-lasting without rapid drying
How to use
Clean both surfaces to be joined from old paste, dust and oils using an appropriate solvent and lint-free cloth. Apply a small, even amount of QOLTEC 51640 to the center of the component surface or as a thin bead and mount the heatsink, allowing the compound to spread under pressure to fill micro-gaps. Avoid applying excessive amounts; a thin continuous layer provides optimal thermal transfer. Reassemble the device following manufacturer torque and mounting instructions.
Usage recommendations
For best results, use the thermal paste at room temperature and ensure component surfaces are flat and clean. Recheck thermal performance after initial run-in and during periodic maintenance; replace the paste only if thermal resistance increases noticeably. Avoid contact with exposed electrical contacts and connectors despite the insulating properties, and follow safe handling guidelines for small amounts of thermal compound.

## FAQ

### How much does the Thermal paste QOLTEC 51640 cost, and is it available for purchase?

The price is 15.99 € (valid at the time of publication and already includes all taxes). The item is available for order — 595 pcs. are in stock, and you can place your purchase right now with delivery across Latvia and Europe or choose pickup at the Riga collection point. We offer favorable purchase terms, including the option to split the payment into convenient monthly installments. Availability and price are updated in real time, so we recommend placing your order in advance.

### If I order this product today, when will I receive my order?

If you place your order today, delivery will be as fast and convenient as possible. You will be able to pick up your order on 30.06.2026 at the Riga pickup point or choose delivery across Latvia and Europe. We carefully inspect every purchase and pack it securely for safe transportation.

### What payment options are available?

AiO.lv offers several payment methods: Bank transfer, Bank cards on-line, Apple Pay, Google Pay. All transactions are 100% secure and encrypted.

### Can this product be purchased for a company (with VAT)?

Yes. AiO.lv works with legal entities in Latvia and across Europe. The product price already includes VAT. For certain product categories, as well as for companies from other EU countries with a valid VAT number, a 0% VAT rate may apply. We issue the invoice immediately after the order is placed, support electronic BIS invoices, and automatically generate all necessary accounting documents. You can complete the purchase for a company online — simply select the company profile and choose bank transfer as the payment method during checkout.

### What is the warranty period?

All QOLTEC products come with an official 2 Years warranty. It covers all manufacturing defects and malfunctions that may occur during use. The warranty is valid at all authorized QOLTEC service centers and through AiO.lv

### Can the product be returned after purchase?

Yes, you can return the product within 14 days of purchase if you bought it as a consumer (not a legal entity). Returns are possible without giving any reason — the main condition is that the product retains its original appearance and full set of accessories. We will make the process as simple and convenient as possible: just contact our customer support team, and we will help you arrange the return.

### Where should I contact for warranty service?

For warranty-related questions you can contact the AiO.lv (SIA VSPRO) customer support team. More information about warranty service: https://aio.lv/en/warranty

### Where can I download the instructions for Thermal paste QOLTEC 51640?

You can download the instructions in PDF format from the “Instructions” section on the product description page. The file contains complete information about installation, setup, and usage.

## Image

https://aio.lv/img/cache/product/767833/56507610_large.webp