Liquid Silicone Rubber (LSR) Molding Services in Canada
Liquid silicone rubber (LSR) molding is the precision process for producing silicone parts at scale. Two-component liquid silicone is metered, mixed, and injected into a heated mold where it cross-links into a finished elastomer part. LSR delivers the unique properties of silicone — biocompatibility, food safety, wide temperature range, chemical resistance, and consistent flexibility — in production quantities and tight tolerances. Canadian LSR capacity supports medical devices, infant care products, food and beverage equipment, and automotive sealing applications.
Liquid Silicone Rubber (LSR) Molding in Canada
LSR molding is the production process for silicone parts that need to be precise, biocompatible, food-safe, and produced in quantity. The two-part liquid silicone material is metered, mixed inline, and injected into a heated mold where it cross-links from liquid to solid in seconds. The result: production-grade silicone parts with the geometric precision of injection molding and the unique properties of silicone elastomer.
Where LSR Wins
Medical devices. Surgical valves, respiratory components, infusion-pump seals, baby pacifiers and bottle nipples, dental aligners, hearing aid earpieces. USP Class VI-certified LSR enables Class II and III medical devices.
Food and beverage. Bakeware, kitchen utensils, ice molds, beverage seals, infant feeding bottles, baby pacifiers. FDA-compliant LSR is widely used in Canadian and US-bound food contact applications.
Automotive sealing. Wire harness seals, sensor housings, ignition components, and high-temperature gasket applications where conventional rubber would fail.
Consumer electronics. Waterproofing seals, button overlays, tactile interfaces, and integrated gaskets in connected devices.
Why LSR vs. Compression-Molded Silicone
| Factor | LSR | Compression |
|---|---|---|
| Tolerance | Tighter | Looser |
| Surface finish | Excellent | Variable |
| Cycle time | Fast (seconds) | Slow (minutes) |
| Tooling cost | Higher | Lower |
| Volume sweet spot | High | Low |
LSR wins for production. Compression remains useful for prototypes, very large parts, and very low volumes.
Canadian LSR Network
LSR capacity in Canada is densest in Quebec and Ontario, with ISO 13485-certified medical LSR molders supporting orthopedic, surgical, and dental customers. Food-grade and consumer-product LSR capacity supports kitchenware brands and infant-care manufacturers across the country.
Liquid Silicone Rubber (LSR) Molding at a Glance
- ISO 9001:2015
- ISO 13485 (Medical)
- USP Class VI (Biocompatibility)
- FDA Title 21 CFR 177.2600 (Food Contact)
- IATF 16949 (Automotive)
Available Materials
Industries We Serve
Frequently Asked Questions
How is LSR different from compression-molded silicone?
Is LSR biocompatible and food-safe?
Can LSR be overmolded onto plastic substrates?
What are typical LSR durometer ranges?
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