Liquid Silicone Rubber (LSR) Molding | Medical Grade

Liquid Silicone (LSR)

Biocompatible, heat-resistant liquid silicone rubber injection molding for medical, consumer, and industrial applications. Flash-free precision parts with excellent elastic memory.

Biocompatible

FDA Compliant

-60°C to +200°C

Flash-Free Molding

Medical Grade

Trusted by

CLIENT A

CLIENT B

CLIENT C

What We Offer

Our Liquid Silicone (LSR) Services

Medical Grade LSR

FDA-compliant, biocompatible LSR parts for medical devices, implantables, and drug-contact applications. ISO 10993 tested materials.

Consumer LSR Parts

Baby products, kitchen utensils, wearables, and consumer goods requiring soft-touch feel, food-safe grades, and vibrant colors.

Industrial LSR Seals

High-performance seals, gaskets, O-rings, and diaphragms with excellent chemical resistance and wide temperature range.

2-Component LSR/Plastic

Overmolding LSR onto rigid thermoplastic substrates for integrated soft-hard assemblies in one production step.

Micro LSR Parts

Micro-precision LSR molding for miniature medical components, micro-seals, and small-scale electronic encapsulation.

Colored & Special LSR

Custom colormatching, translucent/transparent grades, electrically conductive LSR, and self-lubricating formulations.

Materials

Available Materials

We work with a wide range of materials to match your performance and budget requirements.

Standard LSR (Wacker, Dow Corning)

General-purpose liquid silicone rubber with hardness 10–80 Shore A. Excellent for most consumer and industrial applications.

Medical Grade LSR (ISO 10993)

Biocompatible grades tested per ISO 10993 for cytotoxicity, sensitization, and implantation. FDA-compliant.

Food Grade LSR (FDA 21 CFR)

FDA 21 CFR 177.2600 compliant LSR for food-contact applications. Suitable for baking, cooking, and food storage.

High-Temperature LSR

Maintains properties from -60°C to +230°C. Used in automotive and industrial environments with extreme thermal cycles.

Fluorosilicone (FVMQ)

Combines silicone elasticity with fluorocarbon chemical resistance for fuel, oil, and solvent contact applications.

Specifications

Technical Capabilities

Hardness Range

10 – 80 Shore A

Temperature Range

-60°C to +200°C (standard), up to +230°C (HT grade)

Dimensional Tolerance

±0.05 mm (standard), ±0.02 mm (precision)

Flash Thickness

<0.05 mm (near flash-free)

Min Wall Thickness

0.3 mm

Part Weight Range

0.01g – 500g

Colors

Custom Pantone/RAL matching, transparent, translucent

Certifications

ISO 10993, FDA 21 CFR, RoHS, REACH available

Lead Time

10–20 business days (mold + first samples)

FAQ

Frequently Asked Questions

What is the difference between LSR and solid silicone?

LSR is a two-component platinum-cured system injected at low viscosity and cured in a closed mold. It produces flash-free, consistent parts at high speed.

Can LSR parts be colored?

Yes. We use masterbatch colorants to achieve custom colors matched to your Pantone or RAL specification.

Is LSR safe for medical and food contact?

Medical and food-grade LSR grades are available that comply with ISO 10993, FDA 21 CFR, and EU food contact regulations.

What tolerances can you achieve with LSR?

Standard tolerance is ±0.05mm. For critical medical applications, we can hold ±0.02mm with precision tooling and process control.

Can LSR be overmolded onto plastic?

Yes. LSR bonds well to many thermoplastics using primer or self-adhesive grades.

Ready to Get Started?

Upload your files and get a quote for your liquid silicone (lsr) project within 24 hours.

Fast Response

Quote within 24 hours of file submission

NDA Available

Your designs and IP are fully protected

No Minimum Orders

From 1 prototype to 100,000+ production parts