What Do You Need To Know About Urethane Casting?

4 minutes, 57 seconds Read

Have you ever known when urethane resin first appeared in the year 1930? It is being used everywhere and from the International film industry to the small-sized craft rooms. After it is highly tried as well as tested but there are so many other resins available. With a plethora of options available in the industry to select from, how do you know urethane is the right one for you or not? Here, we are going to tell you a lot of things about the Urethane casting services that are important though. Let us reveal all the aspects of this process of casting and get to know what we have to aware of.

What is Urethane Casting?

Simply put, Urethane is used to make some extensive range of plastics and it is a kind of resin. It is the end-use, this is highly versatile, and you can set up both flexible items that are available rubbery texture and very robust plastics. Urethane casting is used in the manufacturing of short-run as well as low-volume products like bespoke models and movie props. It includes Urethane pouring into a mold and cure but we need to talk about the process later. Urethane casting is a low-priced and top-notch way to create some parts and other whole models. It works well for detailed designs and creating a high finish and with no high cost of other associated methods.

The process of Urethane Casting

It can be tricky to cast Urethane and it is advisable to test a sample before big order. You need to aware of all processes and how it works whether you like resin and ignore losing too much in various failed attempts. While trying a new resin, most people get confused and mess up several times and there is no need to worry if it does not go as per the plans.

The process starts with a silicone mold. To create this mold, either 3D printing or CNC Machining is used to manufacture the master model parts, then pouring the silicone into tool imprints associated with the parts will be shaped.

Then, you should mix the Urethane, which comes as two separate liquids. You ought to mix the parts in the ratio of 1:1 or as directions given by the brand. As far as you mixed the both, it starts reacting chemically that turns them from a liquid form to the solid one and this is curing. Curing is also known as room temperature vulcanization and this process seems too advanced but it is the same.

If you are adding a small tint to the resin, then keep it in mind while combining both the liquids. It can take a while to mix the tint and this will give some more time. Urethane will start set down if you have added a tint of the combined resins before you mixed it thoroughly. Once you have done with the tint mixing, you can combine parts A and B of the Urethane. Stir it for about 10 to 20 seconds and then, pour the same into the mold.

Leave the Urethane for around an hour to cure, as you need to follow the timing instructions as given by the brand. Do not forget to read the safety information and they will explain some other aspects about the pot life and techniques of pouring. Once the resin has cured properly, weed it out from the Silicone mold. Repeat the operation for around more than twenty times.

Let us know more about the Urethane Casting services and let us know why it is recommended for the companies to use this technique. There are some of the huge benefits related to these casting methods that make it easy and the most popular option for businesses. Let us know how beneficial it is.

Benefits of Urethane Casting

Urethane casting is a type of manufacturing process for setting up a prototype as well as low-volume parts with the help of Silicone molding to form parts of the Urethane. The parts are formed out of them either plastic or rubber. The process is best suitable for the number of twenty-five parts and it provides an ample number of advantages over other manufacturing processes such as 3D printing, injective molding, and so on. Let us have a look at these below.


The Urethane casting process is very quick because the silicone molds used to make parts through the process are created easily, mainly in comparison with that of the hard tooling used in other methods of injective molding. It is a perfect low-volume manufacturing process when the quantities do not justify the invested amount in the tooling of injection molding.


The liquid poured as well as cured silicone molds are used for the casting of Urethane that is less costly to produce as compared with injection mold tooling. A casting project might take hundreds of dollars but the injection molding takes thousands of dollars and Urethane is effective relatively. Urethane casting is the best method of producing parts that will be determined with the help of part quantity. This process provides a great value for both prototypes as well as low-quantity parts yet the quality is high.


The process of urethane casting can use a wide range of formulations to manufacture parts that are hard or soft and transparent or colored. An excellent surface finish is provided by the silicone and can copy the manufacture textures. In addition to this, it is easy to over-molded parts and incorporated into them and have process treatments such as painting.

After making improvements in the 3D printing method, the material and structure have some limitations present. Urethane casting provides high-quality along with robust parts.

This method of casting is cost-effective, provides high-quality, and easy to meet deadlines as it takes not much time. So, it is highly recommended over other methods that are used in this field such as injection molding and 3D printing.


David Cohen

Rachel Cohen: Rachel is a sustainability consultant who blogs about corporate social responsibility and sustainable business practices.

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