Urethane 101

Urethane 101

Sioux Rubber & Urethane uses proprietary Endurawear® Urethane to enhance the performance of your machinery and equipment and give them a longer life. Endurawear® Urethane is mixed for superior impact resistance, better abrasion resistance, and load release to decrease maintenance costs and increase operating margins.

Polyurethane very generally:

Polyurethane can most easily be thought of as the middle child between plastic and rubber; it takes combines traits from both materials to create a product that is uniquely useful. Polyurethane, very generically speaking, is a mixture of two (or more) liquid chemicals, a prepolymer and a curative, that when combined at the proper ratio and temperatures produce a chemical reaction resulting in a solid finished product. There are thousands of variations to this process to create the desired characteristics of the finished product.

Numerous additives can also be introduced to the polyurethane to change its appearance and characteristics. Additives can be as simple as pigment added to change the color and as complex as graphite, fiberglass, Kevlar, ceramic chips, etc. to improve various different characteristics.
One of the most common variants in polyurethane is its durometer or hardness. Polyurethane can be cast as soft as a 20 Shore A (ex.: rubber band) up to a 90 Shore D (ex.: nylon, military combat helmet). This is one of the first things a manufacturer will ask for when replacing a polyurethane part.


  • Impact resistant coatings
  • Abrasion resistant coatings
  • Roller coverings
  • Spout liners
  • Sheet product
  • Custom molded parts

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Take their

word for it:

It is hard to beat from the aspect of economy, abrasion resistance, lining integrity, and high temperature resistance. [Sioux Rubber] has done an excellent job of installing and testing rubber liners that we have used in our scrubbers and reactors… delivery times are accurate… and the quality of the job is top notch.

Dirk Lohry – Nutra-Flo Chemical Company

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