In the hardness of silicone rubber, silicone that is generally less than 15 degrees is called low hardness soft rubber. This type of silicone is generally relatively soft and easy to demould. Generally, the minimum hardness of added silicone can reach 0 degrees, while the minimum hardness of condensed silicone is around 3 degrees.

Low hardness liquid silicone can be divided into two types: additive silicone and condensed silicone. Additive silicone is generally used for the production of flexible silicone products such as insoles, shoulder pads, chest pads, and chest pads, while condensed silicone is generally used for the production of soap, candles, and other products.