Dow Corning 340 Heat Sink Compound from SkyGeek is designed to penetrate deeply to lubricate your aircraft’s moving parts. Heat Sink 340 is a grease-like silicone fluid that is thickened with metal oxide fillers for better performance and protection in high-heat situations. It promotes a high level of thermal conductivity during flight and is stable at high temperatures. It also has a low bleed rate. Dow Corning 340 lubricant is best used applied to the base and mounting studs of transistors, diodes and silicon-controlled rectifiers. The silicone lubricant also serves as a highly effective thermal coupler for many heat sink devices where it helps maintain a positive heat sink seal which improves heat transfer from the electrical/electronic device to the heat sink or chassis.
Use Dow Corning 340 Heat Sink Lubricant in a variety of aerospace and mechanical applications. The formula is suitable for a wide range of aircraft engines where heat sink properties are required. It can also be used as a high-voltage corona suppressant, nonflammable coating in connections for flyback transformers and TV sets and similar applications. The compound resist changes in consistency at temperatures up to approximately 350°F (177°C) for more reliable performance.
Dow Corning 340 Heat Sink Compound is sold in a five-ounce (142 gram) tube and is easy to apply. The versatile lubricant has a shelf life of 60 months from date of manufacture, so you’ll have plenty of time to use it up. Refer to the product packaging for "Use By" date. Order Dow Corning 340 Silicone Heat Sink Compound from SkyGeek and enjoy competitive pricing along with fast shipping on this versatile lubricant product. The grease lubricant is sold in a convenient five-ounce size and can be shipped same-day for a small additional charge. For those requiring documentation, a manufacturer's certification may be added to your order. Want to stock up? Quantity discounts are also available on this lubricant, so pick up one for yourself and one for every bench in your hangar.
High thermal conductivityLow bleedStable at high temperatures
Typical Properties
Method | Test | Result | | Color | White | ASTM D 217 | Consistency, Penetration unworked worked 60 strokes worked 100,000 strokes | 300 275 245 | Fed. Std. 791, Method 321.2 | Bleed after 24 hr at 392°F (200°C) | 0.05% | Fed. Std. 791, Method 321.2 | Evaporation after 24 hr at 392°F (200°C) | 0.5% | ASTM D 2265 | Drop Point | 570°F (300°C) | ASTM D 1475 | Specific Gravity at 77°F (25°C) | 2.1 | CTM* 0069 | Thermal Conductivity, K Factor | 0.0014 cal/sec-cm-°C | ASTM D 149 | Dielectric Strength** | 210 volts/mil | ASTM D 495 | Arc Resistance | 165 seconds | ASTM D 150 | Dielectric Constant at 100 Hz at 100 kHz | 5 5 | ASTM D 150 | Dissipation Factor at 100 Hz at 100 kHz | 0.01 0.02 | ASTM D 1169 | Volume Resistivity | 2 x 10^15 ohm-cm | ASTM D 4049 | Water Spray Off | 1.3% | |
*CTMs (Corporate Test Methods) correspond to standard ASTM tests in most instances.
**Measured using a sample thickness of 50 mils.
Safety Data Sheet