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Specialist Materials for Industry and Science



Q: Who is responsible for manufacturing Apiezon?
A: Apiezon is manufactured by M&I Materials Limited in the UK.

Q: Who is M&I Materials Limited?
A: M&I Materials Limited is a global manufacturer specialising in materials for industry and science. Please visit

Q: I am interested in learning more about Apiezon, what should I do next?
A: Please contact our expert team who will answer all your Apiezon questions.
Tel: +44 (0)161 864 5409 or complete our enquiry form

Q: Where can I buy Apiezon products?
A: Apiezon products are sold via a global network of distributors. See our Distributor Lists.
Customers based in the UK and Europe can now also buy small quantities of Apiezon greases, Wax W sticks and Sealing Compound Q direct from our Buy Apiezon High Vacuum Greases, Wax W sticks and sealing compound Q Online at APIEZON SHOP

Q: Can I buy Apiezon directly from the Apiezon website?
A: Customers based in the UK and Europe can now also buy small quantities of Apiezon greases, Wax W sticks and Sealing Compound Q direct from our Buy Apiezon High Vacuum Greases, Wax W sticks and sealing compound Q Online at APIEZON SHOP

Q: Where can I find information about Apiezon pack sizes?
A: Please see Packaging.

Q: How do you clean off Apiezon hydrocarbon greases?
A: Wipe off any excess grease with a soft clean lint free cloth. Any residues of grease can be washed away with warm soapy water or by using any aromatic hydrocarbon solvent (toluene, xylene). For a more environmentally friendly solvent, we recommend limonene. They cannot be cleaned using alcohols (ethanol, IPA) or ketones (acetone, MEK).

Q: How do you clean off Apiezon PFPE grease?
A: Wipe off excess grease with a lint free cloth. Residual grease can be cleaned using a perfluorinated solvent. For stringent cleanliness a further stage using acetone is recommended.

Q: How do you clean off Apiezon waxes?
A: To remove the wax after use, simply heat, soften and scrape away larger amounts. Any deposits can then be dissolved away by using any aromatic hydrocarbon solvent (toluene, xylene), or removed using a vapour degreasing bath. Apiezon waxes are not soluble in alcohols (ethanol, IPA) or ketones (acetone, MEK) so these cannot be used for cleaning.

Q: What is the shelf life of the Apiezon product range?
A: The shelf life of all Apiezon products is ten years from the date of manufacture in the original unopened packaging stored at ambient (10 to 30°C) temperatures. If you provide us with the six-digit batch number printed on the outer packaging (e.g. 023456) we can tell you the date of manufacture.

Q: What is the shelf life of an opened Apiezon container?
A: The complex chemical structure of Apiezon greases gives them strong 'gettering' properties, this means that they will readily absorb airborne vapours particularly water, and other hydrocarbons. If volatile vapours are absorbed then the greases will lose their excellent vapour pressure characteristics until these contaminants have been outgassed. This is why we pack the greases in 'vapour-proof' aluminium tubes. As we have no control over the use of the greases once they have been opened we cannot quote a shelf life for the products after opening. Practically, however, if care is taken in re-capping the tubes immediately after use and they are not exposed to volatiles then a long service life should not be a problem. Apart from absorption of volatiles the products are stable and no other changes would be anticipated in the long term. PFPE 501 is perfluoropolyether-based and hence is highly inert and less likely to absorb airborne vapours than the hydrocarbon greases.

Q: Are Apiezon products RoHS compliant?
A: All Apiezon products are RoHS compliant. None of the products contain polybrominated biphenyl (PBB), polybrominated diphenyl ethers (PBDE), Deca-BDE or are formulated using lead, cadmium, mercury or hexavalent chromium. The heavy metal contents are shown in the table below.

  ppm ppm ppm ppm
L <1 <1 <1 <1
M <1 <1 <1 <1
N <1 <1 <1 <1
AP100 <1 <1 <1 1
H <2 <1 <1 <1
T <2 <2 <2 <2
AP101 4 <1 <1 1
AP201 <1 <1 <1 <1
J <1 <1 <1 <1
K <2 <2 <2 <2
W <7 <7 <7 <7
W40 <4 <4 <4 <4
W100 <4 <4 <4 <4
Q <20 <10 <5 <20

Q: Are Apiezon products silicone-free?
A: Yes, all Apiezon products are totally free of silicone.

Q: What happens to Apiezon greases above their melting point?
A: All the greases (apart from H grease) liquefy but then return to their normal state and properties on cooling, providing the temperature rise has not been excessive. The melting point of PFPE 501 is higher than its 250°C operating temperature limit, which should not be exceeded (see Safety Data Sheet).

Q: What o-ring materials are compatible with Apiezon hydrocarbon oils and greases?
A: Apiezon hydrocarbon greases and oils are silicone-free and are compatible with a wide range of o-ring materials including viton, silicone, nitrile (>30% nitrile content), nylon, polyurethane, polyethylene and polypropylene. Due to their hydrocarbon formulation they are not compatible with EPDM (ethylene propylene diene M-class rubber), EPR (ethylene propylene rubber), Butyl rubber and PVC seals.

Q: What o-ring materials are compatible with Apiezon PFPE 501 grease?
A: Apiezon PFPE 501 is perfluoropolyether-based and is compatible with all commonly found plastics, rubbers and polymers.

Q: Are Apiezon hydrocarbon greases resistant to acidic vapours or chlorine?
A: Apiezon hydrocarbon greases are all based on molecularly distilled hydrocarbons and as such will show a high degree of resistance to acidic reagents and chlorine.

Q: Is Apiezon PFPE 501 grease resistant to acidic vapours or chlorine?
A: As Apiezon PFPE 501 is perfluoropolyether-based, it has extremely high resistance to all acids, solvents & corrosives with the exception of PFPE base oils and Lewis Acid catalysts.

Q: Is Apiezon Wax W resistant to strong acid and alkali etch solutions?
A: Yes, it is widely used as an etch resist up to 75°C in all sorts of etchants including KOH, TMAH, EDP, HF, HNO3, NaOH.

Q: Are Apiezon greases suitable for use in an oxygen (or LOX) environment?
A: Due to the small risk of auto-ignition from hydrocarbon-based greases, PFPE 501 is the only product in the Apiezon range suitable for use in this application.

Q: Are Apiezon greases resistant to radiation?
A: Apiezon L and M greases show a degree of radiation resistance with only a comparatively small increase in stiffness after irradiation with 4 MeV electrons to a level of about 1 MGy. After this exposure the lubrication properties of the grease are still satisfactory and this is true at even higher levels of irradiation, although the stiffness increases more rapidly. At high levels of irradiation small quantities of gases, (mainly methane and ethylene) are evolved so that the grease loses its very low vapour pressure characteristics. Nevertheless Apiezon greases L and M are markedly better lubricants at high irradiation levels than other high vacuum lubricants such as silicones, esters and halogenated products.

Q: Do Apiezon greases show luminescence under UV radiation?
A: With the exception of PFPE 501, all of the Apiezon greases show blue luminescence. Full details are in the paper “Long-Lived luminescence from commonly used Apiezon compounds” D.W Cooke, B.L. Bennett. Journal of Luminescence 65:1996. A copy is available on request.

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Products of M&I Materials Ltd.