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
1 Part or 2 Part
- 1 Part or 2 Part - 1 Part
- 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
- Other - Inorganic
- Moisture / Condensation Cure - Moisture
Cure Time (min) 240 Test Method Dry Time (min) 20 to 30
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
Specific Gravity 0.970 Test Method Flash Point (°F) 102.2 Density (g/cm³) 8.3 (lbs/gal)
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
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.
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.
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.
Molykote 321 Dry Film Lubricant may affect certain plastics, rubbers and paints. Test thoroughly before use.
Ethyl acetate, toluene or xylene can be used to scrub off Molykote 321 Dry Film Lubricant after soaking.
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