Liquid silicone and silicone rubber are two forms of the same material, but they differ significantly in their properties and uses.

Silicone rubber: Typically, when people refer to silicone, they are referring to a solid or rubber material made from a silicon polymer compound. Silicone materials are typically solid at room temperature and are used in a variety of applications, including kitchenware, medical devices, and electrical insulation. These materials are known for their elasticity, heat resistance, and durability.

Liquid silicone: Liquid silicone rubber (LSR) is the liquid form of silicone. It is often used in molding applications because it can be injected into molds to create complex, flexible, and precise parts. Unlike solid silicone, liquid silicone is used in a more fluid state before curing and hardening into a pliable final form. LSR has high clarity, excellent weather resistance, and can be made into complex shapes with tight tolerances.

One of the main differences between the two is that LSR is primarily used for injection molding, where it is injected into a mold to form a specific shape, while solid silicone is more commonly used for products that do not require a complex molding process.