Selecting the right synthetic radiation resistant grease for a specific application can be a challenge if you are not experienced, but we will help you try and determine the correct lubricant for you. Radiation resistance The below chart and products mentioned is not an exhaustive list of our radiation resistant lubricants but our most commonly purchased and as such accounts for a high percentage of application. It is mostly grease that is purchased but an oil is also detailed below.

What to read more about this topic and the theory about the chemistry? Check out our article radiation resistant grease introduction.

The radiation resistant grease and oil products mentioned above, in more detail:

Nyogel 718S

Technical Data Sheet(TDS) for Nyogel 718S – click on image to open TDS in new tab.
  • Recommend temperature range of -4 to 260°C
  • Polyphenylether (PPE) base oil.
  • Excellent level or radiation resistance.
  • Base oil kinematic viscosity of 363 cSt at 40°C and 13.1 cSt at 100°C.
  • Silica thickener.
  • How does 718S resist radiation? The structural formulation is the key, the phenolic rings will spin when bombarded with radiation.
  • Superb pedigree as a collimator grease, inside x-ray scanning equipment.
  • PPE base oil can have compatibility issues with some plastics and elastomers.
  • NLGI grade 2.

Uniflor 8512

Technical Data Sheet(TDS) for Uniflor 8512 – click on image to open TDS in new tab.
  • Recommended temperature range of -50 to 22°C
  • Perfluoropolyether (PFPE) base oil.
  • Very good level of radiation resistance.
  • Base oil kinematic viscosity of 65 cSt at 40°C and 9.5 cSt at 100°C.
  • Thickened with PTFE.
  • How does 8512 resist radiation? It is the fluorine-carbon bonds of the PFPE oil that gives 8512 the strength to resist radiation.
  • Good all rounder, 8512 is also resistant to hazardous chemicals and gases.
  • PFPE oil is classed as inert, as is the PTFE so there should be no compatibility issues with plastics and elastomers.
  • NLGI grade 2.

Uniflor 4622R

  • Technical Data Sheet(TDS) for Uniflor 4622R – click on image to open TDS in new tab.

    Recommended temperature range of -20 to 260°C

  • Perfluoropolyether (PFPE) base oil.
  • Very good level of radiation resistance.
  • Thickened with PTFE.
  • Base oil kinematic viscosity of 495 cSt at 40°C and 45 cSt at 100°C.
  • Rust Inhibitor additive included in the formula.
  • How does 8622R resist radiation? It is the fluorine-carbon bonds of the PFPE oil that gives 8622R the strength to resist radiation.
  • Ideal for bearings and mechanical devices were a good film strength is required at high temperatures.
  • 8622R is resistant to hazardous chemicals and gasses.
  • PFPE oil is classed as inert, as is the PTFE so there should be no compatibility issues with plastics and elastomers.
  • NGLI grade 2.

Synrad 1252

Technical Data Sheet(TDS) for Synrad 1252 – click on image to open TDS in new tab.
  • Recommended temperature range of -30 to 175°C
  • Alkylated Naphthalene (AN) base oil.
  • Good level of radiation resistance.
  • Thickened with sodium soap.
  • Base oil kinematic viscosity of 37 cSt at 40°C and 6 cSt at 100°C.
  • Rust Inhibitor additive included in the formula.
  • How does 1252 resist radiation? The aromatic ring structure of the AN base oil is the key to it’s ability to resist radiation.
  • The ‘go to’ grease for general mechanical lubrication and bearing tasks where radiation exposure is possible but levels are not high.
  • AN oil has a good level of compatibility with most plastics and elastomers but there are a few exceptions.
  • NGLI grade 2.

Synthetic Oil 438

Technical Data Sheet(TDS) for Synthetic Oil 438 – click on image to open TDS in new tab.
  • Recommended temperature range of -10 to 225°C
  • Polyphenylether (PPE) base oil.
  • Excellent level of radiation resistance.
  • Kinematic viscosity of 363 cSt at 40°C and 13.1 cSt at 100°C.
  • How does 438 resist radiation? The structural formulation of the oil is key, the phenolic rings will spin when bombarded with radiation.
  • Used to construct radiation resistant sintered bearings and also in thin film applications on high temp noble electrical switch contacts/connectors.
  • Used as the base oil for the Nyogel 718S.
  • PPE base oil can have compatibility issues with some plastics and elastomers.
  • NLGI grade 2.

Radiation Resistance Data And Our Typical Customer. Why don’t we have stacks of radiation resistance data on our products? The answer to this is due to our typical customer so, before reading about the individual radiation resistant lubricants we offer it is relevant to have an insight into our typical customer, which is often beyond the needs of a maintenance repair operation (MRO) engineer. The Synrad 1252 is the nearest product we have to an general maintenance/MRO grease; most of our customers use our grease to lubricate component parts inside their own finished product/device, that could be a spring in a medical appliance, an actuator inside some lifting equipment, a collimator inside scanner/x-ray equipment etc. Typically a device manufacturer will need a specialist lubricant for their device and will have their own unique performance and functional life expectations; the device manufacturer may well ask for our advice on the most appropriate grease given the application criteria and will then purchase a small volume of the chosen lubricant from our range for extensive evaluation/testing; our lubricants are intended to be ‘lube for life’ and are at the premium end of the market, in terms of performance and price. The point here is that our customer owns the intellectual property (IP) for the device specific test data that is generated, so we are unable to publish the data on our website. We can offer samples for evaluation but a good level of engagement is required by the customer for this sample to be supplied free of charge; we would want information about the application, the commercial potential and would want performance feedback and/or test data insight.

Radiation resistance testing is complicated and is cost prohibitive. Even if we had extensive radiation resistance data, our typical customer would still have to conduct their own testing with the relevant lubricant as their own testing would be specific to their own device/application….e.g. radiation type and amount of exposure, speed, force, wear, functional life etc. So at best, any radiation resistance data we could use for marketing purposes would only help a device manufacturer determine whether it is worth short listing our grease/lubricant for evaluation.

Not found what you are looking for? We can assist with radiation resistance grease and oil for both mechanical and electrical applications. We are confident that we can meet your lubrication expectations, so please get in contact and we’ll be happy to assist; we have partners around the world so there is a good chance we have some local assistance. Also, we do not sell the above products at our online shop as they are in the premium category so please get in contact for sample purchase.

Interested in further reading? Take a look at our radiation resistant grease introduction article.

If you are confused by the terminology use here, such as ‘base oil’ and ‘thickener’ then consider our article/video (opens in new tab) What Is Grease?

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