Full definition
A two-component (A+B) platinum-catalyzed addition-cure silicone elastomer system designed specifically for high-speed injection molding, producing precision rubber parts with tight tolerances, excellent repeatability, and minimal flash. Components are mixed 1:1 by a static mixer at the injection unit and cure rapidly in the heated mold (150-200°C, cycle time 10-60 seconds). Advantages over solid silicone (HCR): faster cure cycles, better dimensional precision, automation-friendly (liquid pumping, closed mold), no post-cure required, and inherent biocompatibility (no peroxide residues). Properties: hardness 10-80 Shore A, tensile 5-12 MPa, elongation 200-1000%, temperature range -55 to +200°C, FDA and USP Class VI compliant. Applications: medical devices (seals, valves, syringe gaskets, respiratory masks), infant products (pacifiers, bottle nipples), automotive (connectors, seals, spark plug boots), consumer electronics (keypads, wearable device seals), and LED optics. Per ISO 4633 for LSR specifications. Manufacturers: Wacker (Elastosil LR), Dow (Silastic LSR), Shin-Etsu, Momentive. Requires specialized LSR injection molding machines (Engel, Arburg, Sumitomo).