Condensation type mold silicone, as a type of organic silicone elastomer cured through condensation reaction, occupies an important position in various fields such as industrial mold making, handicraft replication, architectural decoration, and food molds due to its unique chemical properties and operational advantages. The curing process is based on the condensation reaction between hydroxyl groups (- OH) and crosslinking agents (such as ethyl orthosilicate) under the action of organic tin catalysts (such as dibutyltin dilaurate). During the reaction, ethanol, water, or ammonia based small molecule by-products are generated, and a three-dimensional network structure is formed to achieve solidification.

This reaction mechanism endows it with special curing characteristics: the curing speed is significantly affected by temperature and catalyst dosage. For example, complete curing usually takes 4-24 hours at 25 ℃, and the operating time can be flexibly controlled by adjusting the catalyst ratio; The released volatile by-products may have irritating odors and require operation in a ventilated environment. Low quality products may also contain harmful substances, so food contact scenarios must use products that have passed FDA and other food grade certifications.

Compared to addition type silicone, condensation type silicone exhibits significant advantages in cost and operation. Its raw material cost is lower, the mixing ratio tolerance is higher (usually A: B=100:2-5), and the operating threshold is low, especially suitable for small batch or handmade production scenarios.

In terms of compatibility with complex molds, the low viscosity characteristic allows for easy injection of fine textured structures (such as handicraft reliefs and jewelry molds), and the good elasticity after curing makes it easy to demold. These characteristics enable it to accurately replicate antiques, sculptures, and candle molds in the field of arts and crafts; GRC components, Roman columns, and sandstone relief molds can be made in the field of architectural decoration; Can be safely used in the food industry for making chocolate and cake molds; In the field of industrial prototyping, small batch soft molds for resin and gypsum casting can be quickly produced. It is precisely based on its precise control of curing mechanism, optimized balance of cost-effectiveness, and adaptability to multiple scenarios that condensation type mold silicone continues to play an irreplaceable role in the mold system, becoming a key material medium connecting creative realization and industrial production.

Regarding liquid silicone rubber, please refer to our website for details: IOTA Liquid Silicone Rubber