Parylene Coating for Elastomers and O-Rings

Posted by Jake Hinojoza on Jun 20, 2017 8:59:00 AM
Jake Hinojoza

One of the great things about parylene is that its applications can be broad--for example, the countless ways it's used in the medical industry--or extremely specific, like when it is used to coat and protect elastomers and o-rings. This is one application that's as fascinating as it is useful.

A Crash-Course

In order to appreciate this unique application of parylene coating, it is necessary to take a step back. "Elastomer" is a word that refers to many different kinds of rubber, characterized by their ability to stretch far beyond normal capacity and bounce right back into shape. Elastomer is used to make o-rings, which are doughnut-shaped rings used for sealing. This means that the o-ring will have to function well under high stress and, in many cases, extreme temperatures--which in turn means that there needs to be a way to protect the rubber so that it can maintain longevity. That's where parylene coating comes in. Versatile as ever, parylene is the top choice for protecting o-rings in all their applications.

Why Parylene?

What makes parylene coating the best choice for this job? Let our conformal coating experts explain!

  • Flexible. One of the most important characteristics of parylene in this application is its flexibility. Parylene remains rubbery even when dry without compromising protection, which means that the o-rings can continue working properly and safely.
  • Coverage. Parylene is known for its superior coverage. It boasts a uniform thickness and can coat even the most irregular shapes, like cracks or crevices, without any pinholes or weaknesses.
  • Strength. Never underestimate the strength of parylene. This coating can protect o-rings against everything from moisture to chemicals to extreme temperatures, all without interrupting the function of the device or the rubbery qualities of the elastomer.

Interested in more information on parylene coating and its many applications? Contact us today!

Topics: Parylene Conformal Coating