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HomeElectricalElectrical CoatingsDOW® 1446622 DOWSIL™ 340 White Heat Sink Compound Lubricant/Grease - 142 Gram Tube
DOW® 1446622 DOWSIL™ 340 White Heat Sink Compound Lubricant/Grease - 142 Gram Tube
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DOW® 1446622 DOWSIL™ 340 White Heat Sink Compound Lubricant/Grease - 142 Gram TubeDOW® 1446622 DOWSIL™ 340 White Heat Sink Compound Lubricant/Grease - 142 Gram Tube
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DOW® 1446622 DOWSIL™ 340 White Heat Sink Compound Lubricant/Grease - 142 Gram Tube

Part#: 1446622
Our Price (Each): $34.89
   (Sold in increments of 1)
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1 - 5$34.89 ea.
6 - 11$33.87 ea.
12 - 23$32.92 ea.
24 - 35$32.02 ea.
36+$31.16 ea.

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$15.00Add the Manufacturer's Certification:
  • Please allow for an extra 7-10 days for International orders to process, especially orders including HazMat items, or items that are not in stock in our NY Warehouse.
  • International Orders Ship Complete: You get one package shipped which reduces added taxes and duties that may be incurred from multiple shipments.
  • (SDS) Safety Data Sheet Information
    Code: UN3077 | Class: 9 | Group: III - Details |
    (SDS) Safety Data Sheet: MSDS1
    CA Prop 65 WarningWarning: This product may contain a chemical known by the State of California to cause health issues. Details found here

    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, 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.
  • High thermal conductivity
  • Low bleed
  • Stable at high temperatures
  • Specifications
    Typical Properties

    Method Test Result
    Color White
    ASTM D 217 Consistency, Penetration
    worked 60 strokes
    worked 100,000 strokes

    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

    ASTM D 150 Dissipation Factor
    at 100 Hz
    at 100 kHz

    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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