---
product_id: 736701159
title: "Dow Corning 340 Silicone Heat Sink Compound 5oz 142g White Silicone Thermal Coupling Heat Conductive Grease for Electrical Devices PCB Assemblies Computer CPU Heat Sink Non Flowing"
brand: "sanyi"
price: "€ 70.04"
currency: EUR
in_stock: false
reviews_count: 5
url: https://www.desertcart.pt/products/736701159-dow-corning-340-silicone-heat-sink-compound-5oz-142g-white
store_origin: PT
region: Portugal
---

# Dielectric strength 210 V/mil 0.67 W/mK thermal conductivity Non-flowing & non-curing stability Dow Corning 340 Silicone Heat Sink Compound 5oz 142g White Silicone Thermal Coupling Heat Conductive Grease for Electrical Devices PCB Assemblies Computer CPU Heat Sink Non Flowing

**Brand:** sanyi
**Price:** € 70.04
**Availability:** ❌ Out of Stock

## Summary

> 🔥 Keep your tech chill and your projects flawless with Dow Corning 340!

## Quick Answers

- **What is this?** Dow Corning 340 Silicone Heat Sink Compound 5oz 142g White Silicone Thermal Coupling Heat Conductive Grease for Electrical Devices PCB Assemblies Computer CPU Heat Sink Non Flowing by sanyi
- **How much does it cost?** € 70.04 with free shipping
- **Is it available?** Currently out of stock
- **Where can I buy it?** [www.desertcart.pt](https://www.desertcart.pt/products/736701159-dow-corning-340-silicone-heat-sink-compound-5oz-142g-white)

## Best For

- sanyi enthusiasts

## Why This Product

- Trusted sanyi brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Built to Endure:** Maintains performance up to 177°C, delivering reliable heat transfer in demanding environments.
- • **Zero Mess, Zero Stress:** Non-flowing and low-bleed compound keeps your workspace clean and your components safe.
- • **Electrical Safety First:** Exceptional dielectric strength (210 V/mil) protects sensitive circuitry while maximizing heat dissipation.
- • **Stay Cool Under Pressure:** High thermal conductivity (0.67 W/mK) ensures your electronics run cooler and last longer.
- • **Effortless Thermal Mastery:** One-part, grease-like formula—no curing or ovens needed for instant application.

## Overview

Dow Corning 340 Silicone Heat Sink Compound is a premium, white, grease-like thermal interface designed for efficient heat transfer between electrical components and heat sinks. Featuring 0.67 W/mK thermal conductivity, non-flowing and non-curing stability, and a high dielectric strength of 210 V/mil, it ensures reliable cooling and electrical insulation without mess or curing time. Ideal for PCB assemblies, CPUs, and power devices, it maintains consistency up to 177°C, enhancing device longevity and performance.

## Description

Dow Corning DOWSIL 340 Heat Sink Compound White is a one component, grease like silicone that is used for thermal coupling of electrical components to heat sinks. It is non-flowing, non-curing, thermally conductive, low bleed, and has high temperature stability. 142 g Tube. White, non-flowing, highly filled compound, good thermal conductivity. Uses Designed for thermal coupling of electrical devices and PCB assemblies to heat sinks Benefits Thermally conductive compound 1 part Non flowing No need for ovens or curing Increases reliability with heat flow away from circuitry components Dow Corning 340 Thermal Compound is a grease-like silicone material with a high amount of thermally conductive metal oxide fillers. This compound has high thermal conductivity, low oil bleed and good high temperature stability. The compound can maintain consistency up to about 177°C. Therefore, it helps to maintain a reliable heat sink seal, which will improve the heat transfer from the electrical/electronic components to the heat sink or chassis. Dow Corning 340 Thermal Compound is used for bases and mounting bolts of transistors, diodes and thyristor rectifiers. It can also be used for effective thermal connection of many heat sinks that require effective cooling. Typical Use:Compound provides thermal coupling of electrical/electronic devices to heat sinks, can be applied to the base and mounting studs of transistors, diodes and silicon-controlled rectifiers. Brand:Dow Corning Color:White Components:1 part Dielectric Strength:210 V/mil Flash Point:>101.1 °C Specific Gravity: 2.1 Thermal Conductivity:0.67 W/mK Viscosity:542,000 Volume Resistivity:2 x 10^15 ohm-cm

Review: Works great.
Review: Easy to use and spread over desired electronics.

## Features

- Dow Corning 340 Heat Sink Compound, 5oz 142g one tube, Heat Sink Compound, White color, Thermal coupling, Heat Sink & Conductive, Non-flowing, Non-curing, Low bleed, High temperature stability.
- Designed for thermal coupling of electrical devices and PCB assemblies to heat sinks
- Dielectric Strength:210 V/mil. Flash Point:>101.1 °C. Specific Gravity: 2.1. Thermal Conductivity:0.67 W/mK. Viscosity:542,000. Volume Resistivity:2 x 10^15 ohm-cm.
- Thermally conductive compound, 1 part, Non flowing, No need for ovens or curing, Increases reliability with heat flow away from circuitry components

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B0DFWHK2GL |
| Manufacturer | Molykote |
| Manufacturer reference | 340 |
| Package Dimensions | 17.3 x 4.6 x 3.61 cm; 142 g |

## Product Details

- **Brand:** SANYI
- **Item weight:** 142 Grams
- **Liquid volume:** 5 Fluid Ounces
- **Material:** Silicone
- **Package information:** Tube

## Images

![Dow Corning 340 Silicone Heat Sink Compound 5oz 142g White Silicone Thermal Coupling Heat Conductive Grease for Electrical Devices PCB Assemblies Computer CPU Heat Sink Non Flowing - Image 1](https://m.media-amazon.com/images/I/61IqM9VEPLL.jpg)
![Dow Corning 340 Silicone Heat Sink Compound 5oz 142g White Silicone Thermal Coupling Heat Conductive Grease for Electrical Devices PCB Assemblies Computer CPU Heat Sink Non Flowing - Image 2](https://m.media-amazon.com/images/I/61InTQV6pwL.jpg)
![Dow Corning 340 Silicone Heat Sink Compound 5oz 142g White Silicone Thermal Coupling Heat Conductive Grease for Electrical Devices PCB Assemblies Computer CPU Heat Sink Non Flowing - Image 3](https://m.media-amazon.com/images/I/61lgUvTYhyL.jpg)

## Customer Reviews

### ⭐⭐⭐⭐⭐ Review
*by S***T on 1 November 2025*

Works great.

### ⭐⭐⭐⭐⭐ Review
*by W***S on 22 August 2025*

Easy to use and spread over desired electronics.

### ⭐⭐⭐⭐⭐ Review
*by J***F on 5 August 2025*

Works as advertised.

## Frequently Bought Together

- Dow Corning 340 Silicone Heat Sink Compound 5oz 142g White Silicone Thermal Coupling Heat Conductive Grease for Electrical Devices PCB Assemblies Computer CPU Heat Sink Non Flowing
- GENNEL G109 10gram Thermal Conductive Glue, Heatsink Silicone Glue, Thermal Plaster, Silicone Viscous Adhesive Compound for LED GPU MOSFET Printer Chipset IC High Performance

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*Product available on Desertcart Portugal*
*Store origin: PT*
*Last updated: 2026-03-16*