Buna-N is the most common material used to create seals and gaskets. Due to its impressive properties, its application as a manhole cover gasket has multiple benefits. So what is Buna-N, and how can it improve your manhole cover?

Buna-N Rubber

Buna-N, also known as nitrile and NBR Rubber, is a synthetic rubber copolymer of acrylonitrile (ACN) and butadiene. Compared to natural rubber, Buna-N synthetic rubber measures up in a few ways. While natural rubber is more flexible, Buna-N is stronger and more resistant to oils and acids—Buna-N’s low flexibility and high oil resistance result from including nitrile in its polymer composition.

The Use of Buna-N Rubber

Buna-N rubber has many applications, such as o-rings, oil seals, hoses, cable jacketing, disposable non-latex gloves, and, most important to us: gaskets. The substance contains several properties, making it an excellent choice for manhole covers. For example, Buna-N rubber’s high resistance to oil, water, and grease creates the seal between manhole covers and outside conditions. Additionally, the synthetic rubber’s marvelous strength results in abrasion and tear resistance and rebound under heavy compression. It’s no wonder why Buna-N rubber gaskets are the most widely used.

Manhole Covers Direct, the leader in custom manholes and related products, offers round and straight-edge Buna-N gaskets. Reach out to us to get a quote today or to learn more about the benefits of Buna-N.