Rosti
Liquid Silicone Rubber
LSR Molding
Rosti provides high-precision Liquid Silicone Rubber molding for complex, high-performance components that require reliability, hygiene, and outstanding material resilience.
Liquid Silicone Rubber is a two-part platinum-cured elastomer that can be injected into a mold cavity to manufacture a part. LSR is a very versatile elastomer and is found across a wide range of products, from consumer goods to medical devices and everything in between.
Our LSR expertise includes fully automated, flash-free production of durable, biocompatible parts with excellent heat, chemical, and UV resistance. From medical devices and baby care products to automotive sealing systems and consumer goods, we deliver consistent, scalable LSR manufacturing supported by in-house tooling, cleanroom production, and advanced multi-material molding capabilities.

Tony Austin
European Technical Director

The Wide Range of LSR
Since its invention in the mid-20th century, the demand for liquid silicone rubber (LSR) has grown significantly. That’s not surprising when you consider its physical properties and the variety of uses it can serve.
Liquid silicone rubber (LSR) offers a number of benefits, most notably, it is:
- Durable
- Flexible
- Stable
- Versatile
LSR is highly pure, making it suitable for a wide range of applications where strength is essential, along with a need for excellent resistance and unmatched quality. What sets LSR apart from the competition are its unique properties—liquid silicone rubber can be pumped and molded, mostly through the plastic injection molding process.

Experience with Liquid Silicone Rubber
Rosti’s customers value the reliability and quality we always provide, so it’s no surprise our impact on the liquid silicone rubber market is growing as well.
We have successful experience producing the most demanding LSR products, including manufacturing very small, extra-soft parts; with sizes as small as 1g and softness as low as 10A (on the Shore A hardness scale), we’ve achieved results across the board.
Whether you need highly detailed, complex products or something much simpler, liquid silicone rubber might be the ideal material choice. We’re confident Rosti is the right production partner for you.
A Reliable Partner in LSR
At Rosti, we’ve been leaders in liquid silicone rubber (LSR) injection molding for years. Our technical expertise, worldwide network of suppliers and toolmakers, and dedication to quality ensure we deliver outstanding LSR products every time.
