Getting started with liquid silicone rubber: what you need to know

Liquid Silicone Rubber (LSR) is a material for injection moulding that is being used more and more by Enbi Plastics. It is durable, flexible, and extremely versatile. Not to mention, it is also very cost efficient.

By means of this article, Enbi Plastics aims to help you make the right decisions in terms of material type and which process composition best suits your project. Within just a few steps it’ll quickly become clear which choices are important when starting an LSR project. Want to know more about what LSR is exactly? Feel free to read more about the properties and benefits of LSR in our previous article: “Welcome to the World of Liquid Silicon Rubber”.

Would you like to know more about LSR and why it is the best choice for your injection moulding project? Please feel free to contact one of the experts at Enbi Plastics.


The first step in product or project development is determining the right material. In terms of the production process at Enbi Plastics, LSR comes with many benefits. These benefits are more extensively discussed in the previous article. These unique properties make LSR the best choice for a great variety of complex injection moulding projects.

LSR is a versatile material, which makes it suitable for a great variety of uses. For example, LSR can be used in the injection moulding of household appliances such as food processors. Additionally, thanks to its unique characteristics and benefits, LSR is also applicable in areas such as the automotive, agriculture, food, medical, and infant care sectors.

LSR is an extremely versatile material. In other words, LSR offers an expansive range of design possibilities. It has a high thermal stability and neither the mechanical nor chemical properties will change in (extremely) hot or cold environments. It can be used to produce products or components with a high degree of complexity, combined with an extremely high level of precision and large range of geometric possibilities.

LSR is naturally resistant to degradation through chemicals, environment, or UV. The properties of the material remain stable, even with long-term exposure. LSR is also resistant to mold, mildew and other bacteria. In short, LSR is a versatile material and a smart choice for demanding applications.


The next step in starting with an LSR project is to determine the right process. Enbi Plastics has multiple possibilities for injection moulding with LSR, including:

  • 1K Injection Moulding (LIM): The use of silicon products in projects offers many benefits. For injection moulding of silicon, we can use machines with a closing force between 25 and 110 tons. This allows us to create products ranging from less than a gram up to approximately 100 grams in weight, and varying from< 10 Shore A up to 80 Shore A in hardness.
  • 2K Injection Moulding: Combining LSR with a different type of material? This is also possible at Enbi Plastics, with the help of two-component (2K) injection moulding. In 2K injection moulding, both a plastic and liquid silicon part are injected in a single cycle and chemically bonded. The same is possible by bonding two silicon products—for example with two different hardnesses. It is even possible to bond LSR with a metal, for example stainless steel. We use 2K injection moulding in producing complex compositions of parts, for which the design can often be simplified so that no further assembly is necessary. The closing force of our 2K machines varies from 65 up to 220 tons.


Our experts are here to help you out and are happy to advise you on your LSR project. Contact one of Enbi Plastics’ experts and discover how we can turn your projects into reality!

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