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.
Product Details
UOM : Each
Pack Quantity : 1
Size : 142 gm
Color Family : White
Ship Dimensions : 7 x 2 x 2 inches
Shipping Weight : 1.3 pounds
Manufacturer P/N :DOWSIL340
NSN : 6850-00-927-9461
ECCN : EAR99
Schedule B Code : 3824.90.9270
Military Standard : MIL-C-47113 MIL-DTL-47113 A-A-56022
Alt. P/Ns : DC340 DC340-5OZ
Disclaimer: While reasonable efforts have been made to ensure all information on this website is accurate, SkyGeek.com and Styles Logistics, Inc. do not assume responsibility for any errors or omissions. All specifications, illustrations, data and prices are subject to change without notice.
Features
High thermal conductivity
Low bleed
Stable at high temperatures
Specifications
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.
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MSDS1
Warning: This product may contain a chemical known by the State of California to cause health issues. Details found here 
