If you're a design engineer hunting for the right O-ring with excellent abrasion resistance and long-lasting durability, polyurethane O-rings check both boxes. This thermoplastic elastomer resists degradation from exposure to gas, hydraulic oil, hydrocarbon fuels, greases, silicone oils, and mineral oils. 

Polyurethane O-rings, commonly abbreviated as AU O-rings, also age well, withstanding the forces of oxygen, water, and ozone for a long lifespan under harsh conditions. Nevertheless, finding the exact O-ring for your project can take a lot of time—time that Wyatt Seal can save you. 

We can find exactly the right size and material for your O-rings, helping you achieve precision performance for all of your projects.

What Are Polyurethane O-rings?

Polyurethane O-rings are plastic seals connecting two product parts that transfer liquid or gas between them. Squeezed between the two parts under high pressure, the O-ring must create an impenetrable seal that prevents any fluid or gas from escaping. 

They can perform reliably under heavy loads, high impacts, and environments where abrasion, cuts, tears, and cracks are a risk, but only if they're the exact polyurethane composition, size, and shape for your project's specifications.

Benefits of Polyurethane O-rings

If you're looking for O-rings with high load-bearing capacity, superior abrasion resistance, and durability against cracking, tearing, and splitting, Wyatt Seal can find or create the precisely-crafted polyurethane O-rings you need for any project. 

We can source O-rings manufactured from various polyurethane compounds with different temperatures and chemical tolerances. If you can’t find your ideal solution on the market, contact us to manufacture custom polyurethane O-rings matching your specifications.

Common Uses and Applications

Polyurethane O-rings work well under: 

  • High-Impact
  • Grease 
  • Oil
  • Ozone-Laden conditions

Polyurethane O-rings are often the first choice of design engineers working with automotive and aerospace products, including:

  • Gaskets
  • Machine mounts 
  • Wear pads

They also work well in:

  • Bulk material transfer systems
  • Pumps
  • Valves
  • Liquid transfer systems
  • Hydrostatic testing
  • Non-Destructive testing
  • Drive belts, pneumatics
  • Hydraulics applications

Polyurethane O-rings Material Description

Polyurethane plastics consist of organic polymers. These organic molecules are linked with urethane by introducing a polyol to a diisocyanate or a polymeric isocyanate, along with additives and catalysts that generate different types of polyurethane compounds.

Polyurethane is a true performer if you need a cost-effective, durable O-ring in applications interfacing with: 

  • Gasoline
  • Hydraulic Oils
  • Butane
  • Propane
  • Silicone Oils
  • Mineral Oils
  • Fats 
  • Greases

Polyurethane O-rings operate optimally between temperatures of - 40ºF to 180ºF. However, polyurethane O-rings do not work well with steam, hot water, acids, esters, ketones, alcohols, ethers, glycols, amines, or alkalis.

Contact Wyatt Seal for the Right Polyurethane O-rings

Wyatt Seal can quickly help you find the exact O-ring solution, polyurethane or otherwise, to fit your design specifications precisely and durably. 

Our sealing experts have 50 years of experience and relationships that enable us to find the exact O-ring you need—and if that seal doesn’t exist yet, we can make it for you. 

Give us your specifications, and we will guide you easily through the entire process, from design and testing to ordering and delivery. 

We’ll help you find the right solution for any application so that you can remain competitive and ready for the next challenge. Let’s talk about your project today.