There are two main methods of making molds from liquid silicone rubber, one is brushing and the other is pouring the molds, it is depends on the size and pattern of the product.

Pouring Liquid Silicone Rubber are suitable for small and large flat products with neat and simple pattern, which is conducive to the liquid silicone being able to level itself well. Brushing Liquid Silicone Rubber are suitable for products with fine patterns and complex structures.

Here are the main points and operational details of brushing and pouring the silicone molds.

In fact, Pouring liquid silicone rubber is a very simple method, but the most important point is to choose the right hardness according to the size of the product.

The general size of the product between 50-100 cm, the choice of hardness in about 30 degrees of liquid silicone rubber; size of the product in more than 100 cm, choose 35-40 degrees of liquid silicone rubber; product size less than 30 cm, choose 15-20 degrees of liquid silicone rubber.

The working time of liquid silicone rubber is usually 30-40 minutes, and it takes 3-4 hours to fully cure. However, the mould is prone to air bubbles and they are difficult to drain out. This is why it is necessary to use a vacuum machine to remove the air bubbles when pouring liquid silicone rubber.

The brushing process is very technical and involves determining the highest part of the moulding line according to the structure and pattern of the product, and then dividing the product into two parts. To make the parting molds, you need to use clay as an auxiliary material, which is reusable. The operation time for brushing a layer of silicone is 10-15 minutes. The number of layers of silicone molds is around 3-4 layers, with a few layers of gauze in between to enhance the tear resistance.

Silicone molds are taken after 24 hours of curing, it will improve the life of the silicone molds and duplication times .