Elkem LSR-4310 Silicone Elastomer (A-221-10)

A-221-10 (LSR 4310) Liquid Silicone Rubber – Shore A 10

A-221-10 is part of the Elkem LSR 4300 Series, a platinum-cure liquid silicone rubber designed for liquid injection molding (LIM) and precision applications requiring soft, flexible, and durable elastomers. With a Shore A 10 durometer, it provides an ideal balance of softness and mechanical strength.

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 physical properties.

Product Features

• Shore A 10 soft silicone elastomer

• Elkem LSR 4300 Series (LSR 4310)

• 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 flexible, durable 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 soft, flexible materials with added strength

• High-clarity, precision molded parts

A reliable LSR option offering softness, strength, and processing consistency for a wide range of molding applications.