# Thermal paste QOLTEC 51639 — heat sink compound, general-purpose thermal interface material

**URL:** https://aio.lv/en/product--qoltec-51639--767832
**Data updated:** 2026-03-07 10:54 (EET)
**Category:** Thermal Paste
**Manufacturer:** QOLTEC
**Manufacturer code:** 51639
**Warranty:** 2 Years
**Availability:** Available for order
**Price:** 23.99 €
**Prices and availability valid until:** 2026-07-10 23:59
**Price without VAT (21%):** 19.83 EUR
**Can be purchased by legal entities:** Yes (invoice)
**Buy:** https://aio.lv/en/product--qoltec-51639--767832

## Delivery options

| Delivery method | Delivery time | Cost |
|---|---|---|
| Office pickup (2b. Kengaraga str., Riga, Latvia, LV-1063) | 02.07.2026 | free |
| Pickup points | 07.07.2026 | 1.99 EUR |
| Courier delivery to door | 07.07.2026 | 4.99 EUR |

## Summary description

QOLTEC 51639 is a heat sink compound designed as a thermal interface material for transferring heat between electronic components and cooling solutions. This thermal paste is intended for use between CPUs, GPUs, power semiconductors or other heat-generating components and heatsinks or coolers. It ensures improved thermal contact and helps reduce operating temperatures in computers and electronic devices.

## Long description

QOLTEC 51639 thermal paste is a general-purpose heat sink compound formulated to improve heat transfer between electronic components and cooling solutions. Designed for use between CPUs, GPUs, power semiconductors and their heatsinks or coolers, this thermal interface material fills microscopic gaps and surface imperfections to lower thermal resistance and support more efficient cooling in computers and electronic devices.
Advantages
The compound combines efficient thermal conductivity with strong electrical insulation, allowing safe use on components where dielectric properties are important. It spreads easily to create a thin, uniform layer that enhances thermal contact without requiring frequent reapplication. Its stability over time means the paste retains thermal performance and does not degrade quickly under normal operating conditions.
Suitable for
 Thermal coupling between CPUs or laptop processors and heatsinks
 GPU-to-heatsink interfaces in desktop graphics cards
 Power semiconductors and MOSFETs in power supplies or motor controllers
 Small electronic modules or LED assemblies requiring improved heat dissipation
Key specifications
 Type: general-purpose thermal interface material
 Thermal performance: high thermal conductivity
 Electrical behavior: electrically insulating
 Application form: spreadable paste for manual application
 Durability: stable properties over extended use
How to use
Clean contact surfaces thoroughly to remove old paste, dust and oils using isopropyl alcohol or a suitable cleaner, then allow surfaces to dry. Apply a small, pea-sized amount of QOLTEC 51639 to the center of the component die or use a thin, even layer for larger surfaces. Mount the heatsink and secure it with even pressure so the paste spreads to fill micro-gaps. If disassembly is required later, clean both surfaces and reapply fresh paste before remounting.
Usage recommendations
For best results, avoid excessive application which can increase thermal resistance; a thin, even layer provides optimal heat transfer. Ensure compatibility with your cooling solution and observe safe handling practices: keep the compound away from connectors and bare contacts despite its insulating properties, and store the product in a cool, dry place.

## FAQ

### How much does the Thermal paste QOLTEC 51639 cost, and is it available for purchase?

The price is 23.99 € (valid at the time of publication and already includes all taxes). The item is available for order — 744 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 02.07.2026 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 51639?

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/767832/56507609_large.webp