Food Grade LSR Silicone Rubber
Silico® Food Grade LSR is a platinum-cured, high-purity silicone for food contact. It offers heat resistance, elasticity, and durability—ideal for kitchenware, beverage systems, and food-safe seals.
Product Overview
Silico® Food Grade Liquid Silicone Rubber (LSR) is a high-purity, platinum-catalyzed, two-component elastomer specifically formulated for direct and repeated contact with food. Designed for liquid injection molding (LIM), this material offers excellent thermal stability, chemical resistance, and elastic recovery, making it ideal for high-performance kitchenware, beverage systems, and food-grade sealing components.
Manufactured under stringent quality control, Silico® LSR ensures odor neutrality, taste integrity, and long-term durability—essential for both consumer-facing and industrial food contact applications.
Key Technical Specifications
| Property | Typical Value |
|---|---|
| Appearance | Translucent or pigmented (customizable) |
| Mixing Ratio (A:B) | 1:1 (by weight or volume) |
| Viscosity (mixed, 25 °C) | 1,000 – 100,000 mPa·s (grade dependent) |
| Shore A Hardness | 30 – 80 |
| Tensile Strength | 3 – 7 MPa |
| Elongation at Break | 400 – 700% |
| Tear Strength | 20 – 35 kN/m |
| Compression Set (175 °C / 22h) | ≤25% |
| Service Temperature Range | –60 °C to +200 °C (short-term to 230 °C) |
| Odor / Taste | Neutral (no transfer) |
| Sterilization Compatibility | Autoclave, Steam, UV, Boiling |
- Exact values vary by product grade. Custom formulations available upon request.
Certifications & Regulatory Compliance
Silico® Food Grade LSR meets or exceeds major international standards for food safety:
FDA 21 CFR 177.2600 – approved for repeated-use food contact
LFGB (Germany) – compliant with EU food safety regulations
BfR XV (Germany) – meets standards for silicone rubber in food applications
REACH & RoHS compliant, free from BPA, phthalates, halogens, and heavy metals
HACCP compatible – suitable for use in hygienic production environments
Resists microbial growth, surface degradation, and chemical attack
These properties make Silico® an excellent solution for manufacturers seeking global compliance and consistent performance.
Typical Applications
Silico® Food Grade LSR is used across a wide range of consumer and industrial sectors:
Bakeware & Kitchen Tools: cake molds, ice trays, spatulas, lids, baking mats
Beverage Systems: bottle nipples, coffee machine valves, sealing gaskets
Food Packaging Equipment: O-rings, diaphragm valves, tubing
Overmolding Applications: ergonomic grips, seals, and hybrid plastic-silicone parts
Commercial Food Processing: sanitary gaskets, soft-touch contact surfaces
All components made with Silico® LSR are resistant to deformation, odor absorption, and heat degradation, even under continuous use.
Processing Guidelines
Silico® LSR is designed for fully automated, high-precision injection molding using standard LIM equipment.
Mixing Ratio: 1:1 (Part A & Part B)
Injection Unit Temp: 15–25 °C
Mold Temp: 150–180 °C
Injection Pressure: 50–150 bar (application dependent)
Cure Time: 15–60 seconds
Demolding: Excellent self-release, flash-free capability
Post-cure: Not required for standard food applications, optional for extreme purity
Its low viscosity, excellent flow, and short cycle times make Silico® ideal for high-volume production.
Key Benefits of Silico® Food Grade LSR
✅ Food-safe and non-toxic: meets FDA, LFGB, and EU safety standards
✅ Thermal stability: from deep-freezing to high-heat oven use
✅ Platinum-cured: no residual by-products, ultra-low VOCs
✅ Long service life: high tear strength, low compression set
✅ Neutral taste and odor: does not affect food quality
✅ Excellent processability: suitable for both single-shot and multi-material molding
✅ Available in multiple hardnesses and colors
Packaging Options
Standard Packaging:
▪ 20 kg pails (Part A & B)
▪ 200 kg drums
▪ 1,000 kg IBCs (bulk orders)Shelf Life: 12 months in original packaging at 5–25 °C
Storage: Cool, dry conditions; avoid direct sunlight and moisture
Silico® offers comprehensive TDS, MSDS, compliance documents, and customization services for food-grade silicone rubber. Free samples are available for qualified OEMs.
📩 Contact us today for technical data sheets (TDS), safety data sheets (SDS), samples, or custom formulation support.
Jessica G.
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