Dow 321 Dry Film Lubricant

Dow 321 Dry Film Lubricant Datasheet
  • Description for Dow 321 Dry Film Lubricant

    Solvent dispersion of Mo S2, graphite and inorganic binders; cures to dry lubricating film, exceptionally low coefficient of friction, resists chemicals and fuels.

    *See Terms of Use Below

    Application Type Coat, Lubricate, Anti-friction
    1 Part or 2 Part 1 Part
    Material Form Liquid
    Substrate Glass, Metal, Steel
    Industry Gear cutters, Eccentric bolts, Aircraft engines, Aircraft engines
    Manufacturer Dow
    Chemistry Inorganic
    Cure Method Solvent, Moisture
    Cure Time (min) 240
    Color Black, Gray
    Chemical Resistance Acetone, Benzene, Chemicals, Ethanol, Fluid, Fuels, Hydrazine (product is, however, attacked by N2O4), Methanol, Methyl isobutyl ketone, Naphtha, Silicone fluid, Water
    High Temperature Resistance (°C) 450
    Low Temperature Resistance (°C) -178
    Density (g/cm³) 8.3 (lbs/gal)
  • Technical Data for Dow 321 Dry Film Lubricant

    Overview
    • Application Type
    • 1 Part or 2 Part
      • 1 Part or 2 Part - 1 Part
    • Material Form
      • Liquid
    • Substrate
    • Industry
      • Mechanical Fastening Parts - Eccentric bolts
      • Other Transportation - Brake pins and levers
      • Aircraft - Aircraft engines
      • Industrial - Broaches, Chasers, Disconnects, Drills, Milling cutters, Punches, Reamers, Roll stabilizer pins, Splines, Taps, Threaded connections, Trip pivots
      • Gears - Gear cutters
      • Engine - Aircraft engines
    • Chemistry
      • Other - Inorganic
    • Application Method
      • Brush
      • Spray
      • Dip
    • Cure Method
      • Solvent
      • Moisture / Condensation Cure - Moisture
    • Color
      • Black
      • Gray
    Specifications
    Cure Specs
    Cure Time (min) 240 Test Method
    Dry Time (min) 20 to 30
    Material Resistance
    Chemical Resistance Acetone, Benzene, Chemicals, Ethanol, Fluid, Fuels, Hydrazine (product is, however, attacked by N2O4), Methanol, Methyl isobutyl ketone, Naphtha, Silicone fluid, Water
    High Temperature Resistance (°C) 450
    Low Temperature Resistance (°C) -178
    Other Properties
    Specific Gravity 0.970 Test Method
    Flash Point (°F) 102.2
    Density (g/cm³) 8.3 (lbs/gal)
    Business Information
    Shelf Life Details When stored under normal warehouse conditions below 90°F (32°C), Molykote 321 Dry Film Lubricant has a useable life of 24 months from date of manufacture.
    Shelf Life Temperature (°F) <90
    Shelf Life Type from date of manufacture
    Shelf Life (mon) 24
  • Best Practices for Dow 321 Dry Film Lubricant

    *See Terms of Use Below

    1. Surface Preparation

      Parts to be coated should be clean and dust-free. Molykote 321 Dry Film Lubricant may be applied directly to ground or to highly machined surfaces. The best performance has been found on metal surfaces that have been abrasive-blasted so that the surface has a random orientation of 20 to 30 rms finish. Certain surface pretreatments can further enhance the performance and endurance life of the coating.

    2. Application

      Molykote 321 Dry Film Lubricant may be applied by spraying, dipping or brushing. Spraying usually produces the most uniform and precisely controlled film thickness. Dipping is also good if a high degree of uniformity is not essential. Because solids tend to settle rapidly, keep material agitated continuously and keep container covered to prevent resin hydrolysis and solvent loss.

      Molykote 321 Dry Film Lubricant requires no dilution before use unless solvent has been lost by evaporation. If so, add naphtha solvent to restore the original viscosity. Some addition of solvent may also be desirable for dipping or brushing.

      When spraying, use a commercial spray gun of 1-quart capacity or less. A spray booth is desirable. Make sure the working area is adequately ventilated and observe the usual precautions for spray painting.

      Brushing is recommended only when spraying or dipping is impractical or where uniformity is not required.

    3. Curing

      Molykote 321 Dry Film Lubricant is dry to the touch within 30 minutes after application. However, for maximum performance, the coating must be cured by hydrolysis from contact with atmospheric moisture. In a normal room environment of 50 percent relative humidity, the film will cure in approximately four hours.

    4. Testing

      Molykote 321 Dry Film Lubricant may affect certain plastics, rubbers and paints. Test thoroughly before use.

    5. Removal

      Ethyl acetate, toluene or xylene can be used to scrub off Molykote 321 Dry Film Lubricant after soaking.

  • Comparable Materials for Dow 321 Dry Film Lubricant

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Cure Time Test Methods
Cure Time Test Method
240 min Completely cure
Specific Gravity Test Methods
Specific Gravity Temperature
0.970 25°C