Industrial Grade LSR Silicone Rubber
Silico® Industrial LSR: Two-part, 1:1 mix, fast-curing liquid silicone rubber for injection molding. Offers high thermal stability, strength, and flowability—ideal for automotive, electronics, and industrial parts.
Product Overview
Industrial Grade Liquid Silicone Rubber (LSR) is a two-component, addition-cured silicone elastomer developed for precision injection molding in high-volume industrial production. It offers excellent thermal stability, mechanical strength, and dimensional consistency, making it ideal for use in automotive, electronics, mechanical seals, connectors, and other general industrial applications.
Silico® Industrial LSR features a 1:1 mix ratio (Part A & B), fast curing characteristics, and superior flow behavior, enabling flash-free molding, short cycle times, and automated production with minimal post-processing.
Key Technical Specifications
| Property | Typical Value | Test Method |
|---|---|---|
| Appearance | Translucent or light-colored | Visual |
| Mixing Ratio (A:B) | 1:1 | By weight or volume |
| Viscosity (mixed, 25 °C) | 20,000–40,000 mPa·s | ISO 3219 |
| Shore A Hardness | 30–70 | ISO 868 |
| Tensile Strength | 6–9 MPa | ISO 37 |
| Elongation at Break | 300–600% | ISO 37 |
| Tear Strength | ≥25 kN/m | ISO 34-1 |
| Compression Set (22h/175 °C) | ≤25% | ISO 815 |
| Operating Temperature Range | –50 °C to +200 °C | – |
| Cure Condition (injection mold) | 150–180 °C for 20–60 sec | Typical for LIM |
- Note: Values are typical and may vary by grade. Customized formulations available upon request.
Key Features & Technical Benefits
High Thermal Resistance: Continuous use at 200 °C, short-term exposure up to 250 °C
Excellent Mechanical Properties: High tear strength, tensile strength, and elongation
Outstanding Aging Resistance: UV, ozone, and weather-resistant for long-term outdoor use
Electrical Insulation: Stable dielectric properties across wide temperature ranges
Easy Processing: Low viscosity, rapid injection, and self-releasing from mold
Low Compression Set: Maintains shape and sealing performance over time
Application Fields
Industrial-grade LSR is engineered for demanding applications where heat, chemical exposure, or mechanical stress is involved:
Automotive Components: Grommets, ignition seals, sensor boots, vent valves
Electrical and Electronic Devices: Cable connectors, insulation boots, gaskets
Industrial Sealing: O-rings, static and dynamic seals, diaphragms, valve seats
Appliances & Equipment: High-heat pads, anti-vibration mounts, HVAC system parts
General Molding: Industrial plugs, housings, keypads, and rubberized components
Processing Guidelines
Silico® Industrial LSR is suitable for standard Liquid Injection Molding (LIM) systems. Recommendations:
Injection temperature: 20–30 °C (barrel cooled)
Mold temperature: 150–180 °C
Demolding time: 20–60 seconds
Mixing: Dynamic/static mixers, 1:1 metering pump
Mold design: Venting recommended; parting lines should be optimized for flash-free molding
No post-curing is required for most industrial applications unless specified for ultra-low volatility.
Regulatory & Compliance
RoHS and REACH compliant
Halogen-free
UL 94 HB or V-0 (optional grades available)
ISO 9001 production standards
Silico® LSR can be supplied with customized certifications for OEM industrial supply chains.
Packaging Options
20 kg pails (Part A & B)
200 kg drums
1-ton IBC containers (for bulk orders)
Shelf life: 12 months in original sealed containers stored at 5–25 °C.
Contact our technical team to request TDS, MSDS, RoHS reports, or to discuss your custom molding application. Free samples available for qualified industrial customers.
📩 Contact us today for technical data sheets (TDS), safety data sheets (SDS), samples, or custom formulation support.
Jessica G.
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