Can liquid silicone rubber repair damaged silicone products?

Although liquid silicone rubber can be used to repair certain silicone products in some cases, it is generally not suitable for most silicone products. Here are the main reasons:

1. Poor workability: Liquid silicone rubber with a hardness of 70° has high viscosity, making it difficult to mix or de-gas, which prevents the repair process from proceeding smoothly.

2. Weak adhesion: Liquid silicone rubber has poor adhesive properties. While the repaired surface may appear to be bonded, the actual adhesion is weak, and any external force may cause it to detach, resulting in a failed repair.

3. Mismatch in physical properties: Liquid silicone rubber typically has lower hardness (such as 10°, 20°, or 30°), while silicone products may have a hardness of 50° to 70°. This difference in hardness means the repair cannot restore the original performance of the product.

4. Catalyst poisoning: Liquid addition-type silicone rubber contains platinum catalysts, which can become poisoned during the repair process, preventing proper curing and making it unsuitable for repairs.

In summary, the workability, adhesion, hardness, and catalyst issues associated with liquid silicone rubber make it unsuitable for repairing most silicone products. When choosing a repair material, these factors should be carefully considered.