① Dual component: Usually, the raw rubber, filler, and crosslinking agent are mixed into one component, while the raw rubber, filler, and catalyst are mixed into another component. When used, the two components are then mixed by metering. The sulfurization time mainly depends on the amount of catalyst used, with a large amount resulting in fast sulfurization. In addition, the higher the ambient temperature, the faster the vulcanization process; The advantage is that there is no internal stress, no shrinkage, no expansion during vulcanization, and the condensation reaction occurs simultaneously inside and on the surface during vulcanization, without the problem of difficulty in deep vulcanization of thick products. It has no adhesion to other materials and requires a surface treatment agent as a primer when bonding with other materials. Two component room temperature vulcanized silicone rubber can be used as a molding and sealing material.

② Single component: One component room temperature vulcanized silicone rubber is a mixture of low relative molecular weight silicone rubber (capped at 107) with hydroxyl groups and a reinforcing agent, dried to remove water, and then added with a crosslinking agent (containing hydrolyzable multifunctional siloxanes). At this point, the mixed rubber has become a polymer containing multifunctional end groups, encapsulated in a closed container, and extruded in contact with moisture in the air, causing the functional groups in the rubber compound to hydrolyze and form unstable hydroxyl groups, which then condense and crosslink into an elastomer. Single component room temperature vulcanized silicone rubber has good adhesion to various materials such as metal, glass, ceramics, etc. It is particularly convenient to use and generally does not require weighing, stirring, defoaming, or other operations. Sulfurization starts from the surface and gradually progresses deeper. Single component room temperature vulcanized silicone rubber is mainly used as an adhesive and as a sealing and gap filling material in the construction industry

About injection liquid silicone rubber,please check the details: High Strengh Liquid Silicone Rubber IOTA 28-Series