Elkem LSR-4301 Silicone Elastomer (A-221-01)

A-221-01 (LSR 4301) Liquid Silicone Rubber – Shore A 01

A-221-01 is part of the Elkem LSR 4300 Series, an ultra-soft, platinum-cure liquid silicone rubber designed for liquid injection molding (LIM) and precision applications requiring extreme softness, clarity, and flexibility. With a Shore A 01 durometer, it is ideal for applications where maximum compliance and gentle contact are essential.

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 01 ultra-soft silicone elastomer

• Elkem LSR 4300 Series (LSR 4301)

• 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 tough, 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 extreme softness and flexibility

• High-clarity, precision molded parts

A high-performance LSR designed for advanced molding applications where softness, clarity, and customization are critical.