MOLYKOTE 41
Harmonization Code : 3403.19 | Lubricating Preparations (With 70% or More Petroleum Oils) For Automotive and Other Uses
Main features
- Silicone Oil Base and Carbon Black Thickener
- 20 to 290 deg C Service Range
- Water and Oxidation Resistance
Product Description
MOLYKOTE® 41 Extreme High Temperature Grease is an NLGI 2 silicone grease formulated with a silicone oil base fluid and a carbon black thickener. Designed for extreme operating environments, this black grease provides superior thermal stability and does not melt, even at high temperatures. It is ideal for lubricating bearings and components in high-temperature applications such as oven conveyors, kiln dollies, and molten salt evacuation pumps.
Key features
- High-temperature stability: Operates effectively across a service temperature range of -20°C to 290°C and features no drop point, preventing melting at elevated temperatures.
- Environmental resistance: Delivers superior oxidation resistance and excellent water resistance, highlighted by a low water washout of 0.5% (38°C/1 hour).
- Clean formulation: Manufactured without intentional polytetrafluoroethylene (PTFE) or per- and polyfluoroalkyl substances (PFAS).
Applications / Suitable for
- Oven conveyors, kiln dollies, and molten salt evacuation pumps
- Steam turbine regulator links and knife-edge power breakers
- Note: Do not use on painted surfaces or on steel bearings under high loads
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 | Silicone oil, carbon black, corrosion inhibitor | - | Contains zinc naphthenate |
| Appearance | Black[cite: 40, 41] | - | Grease[cite: 40] |
| NLGI Class | 2 | - | - |
| Base Oil Viscosity | 316 | mm²/s | at 25°C |
| Worked Penetration | 260 to 300 | mm/10 | Worked 60 times (JIS K 2220) |
| Density | 1.05 - 1.1[cite: 40, 41] | g/cm³ | Value varies between SDS relative density and TDS reporting[cite: 40, 41] |
| Flash Point | 302[cite: 40] | °C[cite: 40] | Closed cup[cite: 40] |
| Usable Life | 60 | 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 | -20 to 290 | °C | - |
| Drop Point | None | °C | JIS K 2220 |
| Bleed | 4.0 | % | 150°C/24 hours (MIL S 8660) |
| Evaporation | 1.0 | % | 150°C/24 hours (MIL S 8660) |
| Water Washout | 0.5 | % | 38°C/1 hour (JIS K 2220) |
| Four Ball Weld Load | 1,500 | N | 1,500 rpm/1 minute (ASTM D2596) |
| Maximum Dn Value | 75,000 | mm/minute | - |
