Elkem LSR-4325 Silicone Elastomer (A-223-25)

A-223-25 (LSR 4325) Liquid Silicone Rubber – Shore A 25

A-223-25 is part of the Elkem LSR 4300 Series, a platinum-cure liquid silicone rubber designed for liquid injection molding (LIM) and precision applications requiring a balance of flexibility, strength, and durability. With a Shore A 25 durometer, it offers increased structural integrity while maintaining good elasticity.

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 excellent mechanical properties.

Product Features

• Shore A 25 silicone elastomer

• Elkem LSR 4300 Series (LSR 4325)

• 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 durable, flexible finished 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 moderate flexibility with added strength

• High-clarity, precision molded parts

A versatile LSR material offering balanced performance, durability, and processing consistency for demanding molding applications.