Colored Coatings for O-Rings Allow Differentiation of Similar Seals


Because O-ring materials are usually the same color, one seal may appear nearly identical to another, yet vary slightly in dimension or consist of different compounds. In cases where a large number of O-rings may be used in one assembly, such as in automotive component manufacturing, installing a seal in the incorrect location can cause leakage or even failure of the seal. An effective and easy means of segregation within a production facility is therefore critical to ensure that no mix-ups occur.

One of the best ways to differentiate O-rings is to use color-coding. Because lighter colors can be more easily detected within a black or dark assembly, they can also aid end-of-line quality checking. Trelleborg Sealing Solutions recently introduced a new range of colored O-ring seals that can be used for easy identification in an automotive or automated assembly plant. Like clear coatings, the colored coatings are said to improve the friction characteristics of elastomer O-rings.

"Colored coatings are ideal for differentiating seals within production facilities, and Trelleborg Sealing Solutions offers what we believe is the widest range of colored coatings available as standard from one seal supplier," said Simone Frick, Trelleborg's product engineer for O-rings, in a statement. "Much research has been involved in the development of these surface treatments. Ultra-thin, they have no negative effect on the performance of the elastomer O-ring and have the benefit of enhancing friction characteristics. Offering superior resistance against cracking, unlike some competitive products, they are virtually impossible to peel from their substrate."

Trelleborg Sealing Solutions provides a wide range of readily available colored coatings, including turquoise, pink, brown, green, white, blue, yellow, orange and red. The surface treatments can be applied to most seals, standard or custom, in the majority of elastomer compounds.

For more on the colored O-ring seals, visit

Home |  About Us |  Back To Technical Library |  Contact Us
Copyright © 1996-2010 All Rights Reserved.
General or Technical Questions? E-mail