Features
- Excellent oxidation resistance
- Good corrosion protection
- Wide service-temperature range: -65 to 175°C (-85 to 347°F)
- Compatible with many plastics and elastomers
Composition
- Silicone oil
- Ester
- Lithium soap
Applications
Lubrication between rubber and metal parts in pneumatic systems in aircraft, automotive and general industrial applications.
DESCRIPTION
MOLYKOTE® 55 O-Ring Grease is a silicone-based material that helps ensure positive lubrication and sealing by slightly swelling rubber O-rings and seals. This product is heat-stable and oxidation-resistant and is serviceable from approximately -65 to 175°C (-85 to 347°F).
How to use
MOLYKOTE® 55 O-Ring Grease should be applied using brush, grease gun, or automatic lubrication system. MOLYKOTE® 55 ORing Grease can be used in centralized lubrication systems. Do not mix with other greases.
MOLYKOTE® 55 O-Ring Grease has been shown to swell natural rubber. However, compatibility of the lubricant may vary with the plasticizer content of specific materials (especially elastomers). Small-scale compatibility testing should be conducted prior to the use of this product in any application.
MOLYKOTE® 55 O-Ring Grease should not be used with the following materials unless thoroughly tested for your specific application:
- Silicone rubber (SR)
- Polycarbonate (PC)
- Acrylonitrile-butadiene- styrene (ABS)
- Liquid oxygen (or other strong oxidizers)
Typical properties
Specification writers: These values are not intended for use in preparing specifications. Please contact your local MOLYKOTE® sales representative prior to writing specifications on this product.
| Standard(1) | Test | Unit | Result |
|---|---|---|---|
| Color | Off-white | ||
| NLGI consistency class | approx. 2 | ||
| ASTM D217 | Worked penetration | mm/10 | 290 |
| ISO 2811 | Density at 20°C (68°F) | g/cm3 | 0.98 |
| DIN 51 562 | Base oil viscosity at 25°C (77°F) | mm2/s | 100 |
| Service temperature | °C
°F |
-65 to 175
-85 to 347 |
|
| ASTM D566 | Drop point | °C
°F |
220
428 |
| ASTM D147880 | Low temperature torque test at -65°C (-85°F)
Initial break-away torque Torque after 20 minutes running time |
Nm
Nm |
325 x 10^3
35 x 10^3 |
| Coefficient of friction | |||
| Steel ball against plastic surface (POM) Ø ball = 12.7 mm, load = 6.3 N, v =10 mm/s, 24 hr | μ = | 0.03 | |
| Resistance | |||
| DIN 51 808 | Oxidation resistance, pressure drop 100 hr, 99°C (210°F) | bar | 0.1 |
| Corrosion protection | |||
| DIN 51 802 | SKF-Emcor method – degree of corrosion | 0 | |
| FED Std 791 | Bleed, 24 hr at 150°C (302°F) | % | 3.0 |
| Evaporation, 24 hr at 150°C (302°F) | % | 1.4 | |
| ASTM D1264 | Water washout resistance | % | 4.2 |
(1)ASTM: American Society for Testing and Materials. ISO: International Standardization Organization. DIN: Deutsche Industrie Norm. FED: Federal Standard: Testing Method of Lubricants, Liquid Fuels and Related Products.
Handling precautions
PRODUCT SAFETY INFORMATION REQUIRED FOR SAFE USE IS NOT INCLUDED IN THIS DOCUMENT. BEFORE HANDLING, READ SAFETY DATA SHEETS AND CONTAINER LABELS FOR SAFE USE, PHYSICAL AND HEALTH HAZARD INFORMATION.
Usable life and storage
When stored at or below 32°C (90°F), MOLYKOTE® 55 O-Ring Grease has a shelf life of 60 months from date of manufacture. Refer to product packaging for “Use By” date.
Packaging
This product is available in different standard container sizes. Detailed container size information should be obtained from your nearest MOLYKOTE® sales office or MOLYKOTE® distributor.
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