HTV silicone rubber and RTV silicone rubber are two different types of silicone rubber, with some differences in manufacturing, properties, and uses.

The following are their main differences:
High Temperature Vulcanizing Silicon Rubber:
Manufacturing: HTV silicone rubber is manufactured through thermal vulcanization. This vulcanization process requires high temperature and pressure, and is usually carried out during processing.

Physical properties: HTV silicone rubber usually has high heat resistance and can maintain stability at high temperatures. It also has excellent physical strength and tensile elongation.

Curing: HTV silicone rubber needs to be pre cured before processing, and then undergoes secondary curing under high temperature and pressure.
Application: Due to its high heat resistance and physical properties, HTV silicone rubber is commonly used for manufacturing seals, rubber pipes, rubber pads, etc. in high-temperature environments.

RTV Room Temperature Vulcanizing Silicon Rubber:
Manufacturing: RTV silicone rubber is manufactured by vulcanization at room temperature. It can cure at room temperature without the need for high temperature and pressure.

Physical properties: RTV silicone rubber usually has a lower curing rate, therefore the curing time is relatively long. It can still maintain elasticity and softness in low temperature environments.

Curing: RTV silicone rubber does not require high-temperature treatment, making it easier to process.

Application: Due to its room temperature curing properties, RTV silicone rubber is widely used in the production of molds, sealants, electronic component packaging, and model making.

In summary, HTV silicone rubber is suitable for applications that require high heat resistance and physical strength, while RTV silicone rubber is suitable for scenarios that require rapid curing and high flexibility at room temperature. The choice of silicone rubber depends on the specific application requirements.