Which silicone mold has the smallest shrinkage and shrinkage rate

Silicone mold is an elastic material with a certain hardness that is cured from two-component mold liquid silicone. Since it is an elastic material, it has a certain degree of shrinkage. So, what is the smallest shrinkage rate of silicone mold?

Experienced people know that silicone molds are divided into two types: additive silicone and condensed silicone. The shrinkage rate of condensed silicone is generally less than or equal to 0.3%, while the shrinkage rate of additive silicone is generally less than or equal to 0.1%. Generally speaking, the shrinkage rate of high-hardness silicone is slightly smaller than that of low-hardness silicone. Currently, the hardness range of condensed silicone on the market is 5A~35A, and the hardness range of additive silicone is 0A~60A. However, considering the cost, additive silicone is more expensive than condensed silicone. Therefore, when choosing, it is necessary to balance the difference between shrinkage rate and cost.