Elkem LSR-4370 Silicone Elastomer (A-225-70)

A-225-70 (LSR 4370) Liquid Silicone Rubber – Shore A 70

A-225-70 is part of the Elkem LSR 4300 Series, a platinum-cure liquid silicone rubber engineered for liquid injection molding (LIM) applications requiring maximum strength, rigidity, and durability. With a Shore A 70 durometer, it is the firmest material in the series, providing excellent structural integrity and wear resistance.

This two-part, 100% solids system is supplied as a pumpable, colorless, translucent paste. When Parts A and B are mixed in a 1:1 ratio, the material cures via addition-cure (platinum) chemistry to form a tough, optically clear elastomer with outstanding mechanical performance.

Product Features

• Shore A 70 high durometer silicone elastomer

• Elkem LSR 4300 Series (LSR 4370)

• 1:1 mix ratio (Part A : Part B)

• Platinum (addition-cure), solvent-free system

• High clarity / translucent appearance

• Long working time

• Designed for liquid injection molding (LIM)

• Produces very strong, rigid, and durable parts

Processing Notes

• Non-pourable – designed for pump/injection systems

• Supplied as a paste-like material

• Requires heat curing for full vulcanization

Cartridge Options

• Available in 50 mL, 200 mL, and 400 mL cartridge systems

• Can be pigmented for custom color matching

Applications

• Injection molded silicone components

• Applications requiring maximum strength and rigidity

• High-clarity, precision molded parts

A high-performance LSR designed for demanding applications where durability, structural strength, and precision are critical.