MOLYKOTE EM-50L
Harmonization Code : 3403.19 | Lubricating Preparations (With 70% or More Petroleum Oils) For Automotive and Other Uses

Main features
- Broad Plastic Compatibility
- 100% Silicone-Free PAO Grease
- Low-Seepage Long-Service Lubrication
Product Description
MOLYKOTE® EM-50L Grease is an NLGI 1 lubricating grease specially developed for plastic components and precision equipment. Formulated with a polyalphaolefin (PAO) synthetic base oil and a lithium soap thickener, this translucent white grease is highly effective at acting as a damper grease to reduce noise in moving parts, such as plastic gears. Furthermore, its completely silicone-free composition ensures it will not cause contact point failures in sensitive electrical applications.
Key features
- Plastic compatibility and noise reduction: Highly compatible with most plastics and specifically formulated to dampen and reduce noise generated by plastic gears.
- Silicone-free formulation: Does not contain silicone, preventing the widespread issue of contact point failures in nearby electrical components.
- Clean, long-life lubrication: Designed for long service life with low seepage, making it ideal for applications where cleanliness is strictly required.
Applications / Suitable for
- Automobiles and electrical appliances containing plastic parts
- Precision equipment, audio equipment, and office equipment
- Use as a damper grease to reduce noise in moving components
TDS, SDS & Technical Documents
Technical Specifications
No specifications available.
Additional Information
As-supplied / before-processing properties
Typical properties; these values are not intended for use in preparing specifications.
| Property | Value | Unit | Method / condition |
|---|---|---|---|
| Chemical Composition | Polyalphaolefin base oil, lithium soap thickener | - | Silicone-free |
| Appearance / Color | Translucent, white | - | Grease |
| NLGI Consistency Class | 1 | - | - |
| Base Oil Viscosity | 1,050 | mm²/s | at 40°C |
| Worked Penetration | 325 | - | Worked 60 times (JIS K 2220) |
| Density | 0.84 | g/cm³ | JIS K 2220 (Relative density 0.84) |
| Flash Point | > 100 | °C | Seta closed cup (212 °F) |
| Shelf Life | 36 | months | From date of production when stored unopened in a cool, dark place |
After-processing / in-service properties
Typical properties; these values are not intended for use in preparing specifications.
| Property | Value | Unit | Method / condition |
|---|---|---|---|
| Service Temperature Range | -40 to 150 | °C | JIS K 2220 |
| Drop Point | 195 | °C | JIS K 2220 |
| Bleed | 2.5 | % | 100°C, 24 hours (JIS K 2220) |
| Evaporation | 3.0 | % | 99°C, 22 hours (JIS K 2220) |
| Oxidation Resistance | 0.02 | MPa | 99°C, 100 hours (JIS K 2220) |
| Copper Corrosion | 1A | - | 100°C, 24 hours (JIS K 2220) |
| Four Ball Weld Load | 1,400 | N | 1,500 rpm/1 minute (ASTM D2596) |
| Four Ball Wear Scar | 0.71 | mm | 1,200 rpm, 392 N, 1 hour (ASTM D2266) |
| Low Temperature Torque (Starting) | 290 | mNm | at -40°C (JIS K 2220) |
| Low Temperature Torque (Running) | 140 | mNm | at -40°C (JIS K 2220) |





















