Polyurethane Molding/

Castable Urethane

Castable urethanes are elastomers that contain urethane carbamate links, are processed in liquid form, and are extremely well-suited for casting. Although they vary widely in terms of hardness and chemical composition, castable urethanes as a whole offer exceptional physical characteristics including high abrasion, chemical resistance, tensile strength and load bearing capabilities.

Gallagher Corporation
Gurnee, IL
800-373-8793
For the Gallagher Corporation, the greatest strength is solving problems and providing four decades of experienced engineering support for customers around the world. Their aim is to be your best supplier, and they are proud to offer technical competence and on-time quality production to all clients. For castable urethane, Gallagher is the company to turn to.
American Urethane, Inc.
Odenton, MD
800-394-7883
American Urethane is a premiere supplier of parts and components for industries all over the world. They set themselves apart from the competition by providing the most rapid response possible to quotes and inquiries. They even have an engineer respond to your quote so you can talk to someone who understands your needs and concerns. For castable urethane, make sure to call.
Unicast Inc.
Easton, PA
800-275-0818
Since they opened their doors in 1984, Unicast Inc. has been creating castable urethane. Unicast Inc. has a standard catalog of replacement parts for various industries. And if they don't have exactly what you need, they also make custom parts to fit any application. For all your needs, or to get a quote, be sure to contact Unicast today so you can get started!
FallLine Corporation
Reno, NV
800-325-5463
The FallLine Corporation is constantly striving to utilize only the best materials and tooling technologies to fit your application and performance requirements. When it comes to quality castable urethane, they provide exactly what you have been looking for. So, let FallLine be your partner in finding a polyurethane solution to meet your needs.
Weaver Industries, Inc.
Denver, PA
717-336-7507
At Weaver Industries they promise all customers that they will go to great lengths to ensure that you receive the highest quality product, when you need it and at cost competitive pricing. They have knowledgeable, friendly and effective staff at all levels within the business. For castable urethane, they are the company to turn to for honesty and integrity.
Western Roller Corporation
Bend, OR
800-541-2317
If you choose Western Roller Corporation, you are choosing high-performance products that offer reliability and long life for your particular application. The company provides parts for a wide variety of industries and is always striving to improve their methods so that only the best products are created at competitive prices. For castable urethane, contact us today.
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Industry Information

Castable Urethane

Castable urethanes offer many advantages over other materials types. For instance, castable urethanes offer increased noise reduction, impact resistance, durability and flexibility versus metal; increased elastic memory, resilience, radiation resistance and lower tooling costs than plastics; and increased colorability, oil resistance and a broader hardness range than rubbers. As thermosetting elastomers, castable urethanes have a wide range of applications and are used in varied industries including: automotive and aviation, for parts such as flares, wheel chocks and spoilers; industrial manufacturing, for conveying system liners, hopper liners, transport rollers and agitator blades; furniture, for headboards, drawer fronts and holding fixtures; and retail, for point of purchase (POP) displays. Additional characteristics of castable urethanes include good insulating properties, high moisture-resistance, long service life, suitable for sanitary applications and resistant to cold flow. However, the negative of castable urethane is that it has an unpleasant smell that does not go away after fabrication.

There are two main types of castable urethanes: polyether-based elastomers and polyester-based elastomers. The two types differ in terms of characteristics, which allow one type to be better-suited for an application versus the other, as well as chemical make-up. As an example, for the soft segment, polyether urethanes will commonly use polytetramethyleneether glycol (PTMEG) or polypropylene glycol (PPG); while polyester urethanes will often use polyethylene adipate (PEA) with the addition of different polyesters to achieve certain characteristics. As for the differing characteristics, polyether urethanes have advantages such as superior hydrolytic stability, low boiling points, low chemical reactivity and excellent dynamic performance; polyester urethanes, however, offer benefits such as high oil resistance, high thermal stability, excellent physical properties and superior toughness. Since the raw materials of castable urethane exist in liquid form, they are easy to mix and measure for the casting process, which may be open or closed. To begin casting, the castable urethane is poured into an open cavity at low pressure, where it undergoes elevated temperatures in order to be cured. The application of pressure is not required to mold the shape, the heat is enough. During closed urethane casting processes such as reaction injection molding (RIM), the castable urethane is injected into the closed cavity through small holes. This process is typically much quicker than open casting, and can take as little as sixty seconds.