Designed for applications requiring tight tolerances, complex geometries, and secure biocompatibility, silicone LSR delivers exceptional mechanical properties and reliable manufacturing performance.

Whether you are developing catheter components, microfluidic devices, valves, or instrument grips, Momentive LSR helps you achieve superior part quality with repeatable results.

Why Momentive Silicone LSR for Medical Micromolding?

Medical micromolded components demand materials that can deliver the following:

LSR meets these requirements with a balanced combination of flexibility and performance, making it ideal for micromolded medical parts and surgical tool components.

Momentive’s LSR portfolio includes grades engineered for micromolding performance, offering the benefits below.

1. Consistent Flow & Fill
Low viscosity and optimized cure profiles support uniform filling of microfeatures and thin walls, ensuring repeatable part definition with minimal flash.

2. Dimensional Precision
Controlled cure kinetics and low shrinkage yield components with tight tolerances, critical for microfluidic channels, sealing elements, and surgical interfaces.

3. Biocompatibility & Regulatory Support
Many Momentive LSR grades meet ISO 10993 biocompatibility criteria, making them suitable for a wide range of implantable and nonimplantable medical applications when formulated appropriately.

4. Mechanical Performance
Excellent elasticity, tear resistance, and compression set behavior support durability in demanding use cases such as instrument tips, gaskets, and medical seals.

5. Thermal & Chemical Resistance
Stable performance across sterilization methods (autoclave, gamma, and EtO sterilization) and resistance to common medical fluids and disinfectants.

These micromolded performance features help engineers and production reduce cycle times, improve yield, and scale from prototype to high-volume production.
 

Recommended Momentive LSR Grades for Micromolded Medical Devices

Silopren™ LSR 4000 Series: Medical Grade, Low Durometer

• Hardness: ~30A (soft, flexible)
• Key Benefits: Excellent biocompatibility, good transparency, thermal stability, and high elongation; low viscosity and fast cure for high-precision injection molding with short cycle times
• Medical Compliance: FDA and USP Class VI compliance supports healthcare applications
• Performance: High recovery after deformation makes it ideal for wearable or dynamic medical components; good compatibility with steam autoclave, E-beam, gamma, and EtO sterilization methods
• Medical Use Cases: Suitable for O-rings, diaphragms, needle-free access valves, septa, instrument grips, and other critical medical parts where consistent performance under stress is required. 

Start Your Medical Silicone Design with Confidence

If you are designing micromolded medical components, surgical tool parts, or precision silicone interfaces, choosing the right LSR material is critical to performance and regulatory success.