Reasons for non curing of silicone in liquid molds

When making silicone molds with liquid silicone, sometimes after waiting for 48 hours, we find that the silicone gel in the mold still hasn't solidified, or only some of the cured parts don't solidify. What is the reason for the non solidification? The hardness of liquid silicone is generally adjusted according to the needs of the application, but some users have found that the hardness of the silicone mold made is relatively high, which often occurs in inexperienced new users.

1. Too much or too little curing agent can affect the curing of silicone.

Solve the problem of adding the curing agent according to the specified proportion, and make sure to read the instructions clearly whether it is a volume ratio or a weight ratio.

2. Solve with the corresponding type of curing agent. The operating tools are also classified and not mixed. If it is an additive silicone, do not come into contact with condensed products.

3. The mixing of silicone and curing agent is uneven.

When handling silicone and curing agents, it is necessary to thoroughly stir and pay attention to the bottom of the container.

4. Incomplete curing (incomplete drying) only occurs on the contact surface of the mother mold, while other parts are cured well.

Solve the problem of applying a layer of isolation film on the surface of the mother mold to prevent the components in the mother mold that are not conducive to silicone curing from coming into contact with the mold silicone.

5. If the temperature is too low, it can also cause non curing. When the operating temperature is below 0 degrees, the silicone and curing agent will not react.

When the temperature is between 20-30 degrees Celsius, it is the most ideal mold silicone curing temperature.

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