Colored coatings for O-Rings

Colored coatings for O-Rings

Colored coatings for O-Rings

Trelleborg Sealing Solutions launches a range of colored coatings for O-Rings. Based on superior coating technology, these surface treatments are ultra-thin and resistant to cracking and peeling. Allowing segregation of similar seals, they demonstrate almost the same properties as comparable clear coatings, facilitating both push-fit and automated assembly.

“Ideal for differentiating seals within production facilities, Trelleborg Sealing Solutions offers what we believe is the widest range of colored coatings available as standard from one seal supplier,” says Simone Frick, Product Engineer for O-Rings. “Much research has been involved in the development of these surface treatments. Ultra-thin, they have no negative affect 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.”

Seals can appear identical – color-coding is an ideal way to segregate similar seals

As O-Ring materials are usually black, one seal may appear almost identical to another, but can vary slightly in dimension or be of different compounds. A large number of O-Rings may be used in one assembly. This is especially the case in automotive component manufacture and installing a seal in the incorrect location can cause leakage or even seal failure. For instance, an Ethylene Propylene Diene Rubber (EPDM) and Nitrile-Butadiene Rubber (NBR) O-Ring can appear identical but the EPDM material is resistant to water and dissolves in oil while the NBR is resistant to oil and dissolves in water.

An effective and easy means of segregation within a production facility is therefore critical to ensure there are no mix-ups and color-coding is one of the best ways of segregating O-Rings . In addition, as lighter colors can be more easily detected within a black or dark assembly, they can also aid end-of-line quality checking.

Colored coatings are as effective as clear coatings in improving the friction characteristics of elastomer O-Rings

Like clear coatings, the colored coatings improve the friction characteristics of elastomer O-Rings . Dependent on the surface treatment, they can make once only push-fit assembly easier or facilitate automated assembly, preventing the O-Rings sticking together during this process.

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.