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The advantages of using MOLYKOTE® 111 Compound for O-ring lubrication and sealing


Table of Contents

Lubricant application story: Joints

Customer’s area of concern

Customer’s description of component

Desalination typically is accomplished through one of two processes: osmosis or reverse osmosis. The application detailed here was found in the process of seawater reverse osmosis (SWRO). SWRO is a filtration method that removes many types of large ions by applying pressure when it is on one side of a selective membrane. The process of applying an external pressure to reverse the natural flow of pure solvent is called reverse osmosis. During assembling of the membranes, a grease is needed to lubricate the O-ring that connects between the series of membranes and to seal the O-ring and the countersurface from highpressure water (about 1,200 psi/82 Atm).

Previous solution/product previously used
Lithium-based grease with EP additives


Operational parameters (LETS)

1,200 psi (82 Atm)
Process description
Grease applied to O-rings using a swab


Customer’s critical requirements

Problem details
The previously approved material did not have the appropriate certifications and approvals for food and water contact. The customer was looking for a product that was approved to FDA 21 CFR 175.300, NSF-51, NSF-61 and WRAS.
Root-cause analysis
The previously used material was not certified appropriately for food
and water contact.

MOLYKOTE® Smart Lubrication™ solution selected

Our product/differentiators
MOLYKOTE® 111 Compound does have a food approval and is certified by WRAS.
Result: Our solution
MOLYKOTE® 111 Compound is a good, reliable product available in a variety of packaging sizes.


Learn more: Contact us

To learn more about the advantages of using MOLYKOTE® 111 Compound for O-ring lubrication and sealing in SWRO desalination – or for other tough lubrication challenges – contact your MOLYKOTE® technical representative.

We are your technical partner.

If you have any questions or want to find out more about the possibilities for your industrial application, please complete the contact form and one of our experts will be in touch.

If you have a problem with industrial adhesives, sealants, lubricants or electronic protection products and require advice, you can contact our technical support service. Our team can help you to optimize your processes and applications.

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