How to choose the hardness of Rtv2 liquid silicone

The hardness of transparent liquid silicone rubber varies from 0 hardness to 60 hardness, and the optimal hardness selection is 20-40 hardness. The specific selection is as follows: 0 hardness silicone is an ultra soft silicone, with a semi transparent liquid color, excellent electrical properties and chemical stability, weather aging resistance, physiological inertness, non-toxic and odorless, low linear shrinkage rate, and other easy to operate characteristics; Commonly used for human appearance, sex products, chest patches, simulated human faces, etc;

Mold silicone with low hardness of 5-10 hardness is commonly used in sex products, human prosthetics, delicate and soft soap handicrafts;

It is recommended to use 10-25 hardness for replicating product models with very fine patterns and performing injection molding operations. This mold opening method is relatively easy to demold and will not damage the products inside the silicone mold. It can be used for cake molds, chocolate molds, candle making, and various handicraft molds.
25-40 hardness Celsius is commonly used for the production of models such as cement, concrete, cultural stones, and rapid prototyping;
40-60 hardness high hardness silicone is generally leather embossed silicone, mainly used for mold making, leather pattern replication, leather pattern pressing, etc.

For injection molds (packaging molds), silicone with a hardness of 20 hardness and 40 hardness can be selected:
The 20 hardness mold silicone has the following characteristics: suitable for making small handicrafts, good fluidity, low viscosity, easy to remove bubbles, easy operation, good elasticity, not easy to tear, and easy to pour.

40 hardness mold silicone has the following characteristics: it is suitable for making large products, and its viscosity is relatively low. It is similar to 20 hardness in all aspects, but 40 hardness is more suitable for making large products.

If you don't know how to choose the mold silicone that suits the hardness of your product, you can consult our HANAST silicone online.