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Liquid Silicone Rubber (LSR) is a versatile silicone elastomer platform optimized for liquid injection molding processes requiring speed, precision, and design freedom. As a platinum-cured, two component material, LSR supports rapid molding and curing cycles while maintaining excellent mechanical properties and dimensional consistency—even intricate or thin walled part designs.
Momentive’s Silopren™ and LIM™ liquid silicone rubber solutions are developed to support a wide range of applications, including medical devices, sealing systems, and over molded components. With options for primeless adhesion, biocompatibility, and post curing optimization, these LSR materials help manufacturers meet performance, regulatory, and production efficiency goals.
Liquid Silicone Rubber (LSR) is a two component, platinum-cured silicone elastomer designed for liquid injection molding. It offers excellent thermal stability, mechanical strength, and precision molding for complex, high-volume parts.
LSR refers to the material itself, while LIM (Liquid Injection Molding) describes the manufacturing process used to mold liquid silicone rubber into finished components.
LSR is commonly used in medical devices, sealing systems, electrical components, consumer products, and industrial applications requiring durability, flexibility, and precise part geometry.
Yes. Select Momentive LIM™ liquid silicone rubber grades are biocompatible and suitable for medical applications such as IV components, valves, surgical instruments, and sealing elements.
Self-bonding LSR grades are formulated to bond directly to specific substrates—such as thermoplastics or metals—during molding, eliminating the need for primers or secondary bonding steps.
Post curing enhances physical properties such as tensile strength and compression set, while also reducing volatile and cyclic siloxanes to help meet regulatory and industry standards.
Momentive’s LSR materials are available in a wide range of Shore A hardness values, typically from 30 to 80 Shore A, allowing engineers to balance flexibility, strength, and sealing performance.
As a premier global high-performance Silicones and specialities company, Momentive creates solutions that improve the quality of life for people and enable a more sustainable future.
