Extreme Low-Temperature Silicone Grease

PST-434 is an extreme low-temperature, silicone grease with Lithium filler that provides reliable lubrication at temperatures as low as −70°C. This product was formerly known as SSP-1201-A and is now a PolySi® G-MAN® silicone lubricating compound.

For small quantities, please visit and type the product number (e.g. PST-434) in the search box.

Data Typical Values
Appearance Off-White/Yellow
Temperature −70°C to 204°C
Unworked Penetration (240 – 300 range) 260
Worked Penetration (270 min) 280
Evaporation < 1.5% @ 475°F
Specific Gravity 1.00 – 1.06
Hegman Grind 2.5 mils

Extreme Low-Temperature Silicone Grease with Lithium Filler

PST-434 is a silicone grease that’s designed for demanding applications where maximum surface contact is required under load, and where extremely low temperatures are expected. This Lithium-filled silicone grease is comparable to Dow Corning Molykote 33 bearing grease (DC-33) from Dow Corning, and Novagard G321 silicone lubricant.

PST-434 Silicone Grease Features

PST-434 has an operating range of −70°C to 204°C and an unworked penetration in the 240 to 300 range with a typical value of 260. This silicone lubricating grease provides the following features:

  • Water repellent
  • Radiation resistant
  • Chemically inactive
  • Non-corrosive

In addition, PST-434 silicone lubricant combines hydrolytic stability with chemical and thermal resistance.

PST-434 Silicone Grease Applications

Applications for PST-434 silicone grease include:

  • aircraft and marine cables
  • mine fuse parts
  • low-temperature moving parts
  • low-speed parts

PST-434 Packaging and Product Specifications

PST-434 is supplied in drums, plastic pails, jars, cartridges, and plastic tubes. Private labeling and custom packaging are available to meet special requirements. Contact PolySi Technologies for more information.