High-temperature vulcanized silicone rubber is a high molecular weight (molecular weight is generally 40 to 800,000) polyorganosiloxane (i.e., raw rubber) added to the reinforcing filler and various other additives, using organic peroxide as the vulcanizing agent, by pressurized molding (molding, extrusion, calendering) or injection molding, and cross-chained into a rubber at high temperatures. This rubber is generally referred to as silicone rubber.
High-temperature vulcanization of silicone rubber vulcanization is generally divided into two stages, the first sub-stage is the silicone raw rubber, reinforcing agent, additives, vulcanizing agent and structure control agent for mixing, and then the mix in the metal mold pressure heating molding and vulcanization, the pressure is about 50 kg / cm2, the temperature of 120 ~ 130 ℃, 10 ~ 30 minutes, the second stage is the silicone rubber from the mold out The second stage is to remove the silicone rubber from the mold and put it into the oven at 200～250℃ for several hours to 24 hours. Make the rubber further vulcanization, at the same time make the organic peroxide decomposition volatilization.
Silicone rubber reinforcing filler is a variety of types of silica, which can make the strength of vulcanized rubber increased tenfold. Add a variety of additives is mainly to reduce the cost of rubber, improve the performance of the rubber as well as give the vulcanized rubber a variety of special properties such as flame retardant, conductive and so on. Crosslinking agents are various organic peroxides, such as benzoyl peroxide, 2,4-dichlorobenzoyl peroxide, dikuuji peroxide, 2,5-di-tert-butyl peroxyhexane and so on. Structure control agent is in order to avoid the mixing of rubber material placed for too long, produce "structuring" to make the rubber hard hard, difficult to process and add the maturity, can be used as a structure control agent methyl hydroxy silicone oil or diphenyl dihydroxy capture alkanes.
Silicone rubber side groups on the main chain can be methyl, ethyl, vinyl, phenyl, trifluoropropyl and so on. Methyl is most commonly used, and other groups may be introduced to improve processing and other properties. Therefore, according to the side groups and the formulation of the rubber, you can get a variety of different uses of silicone rubber, generally can be divided into the following types: general-purpose (containing methyl and vinyl), high and low temperature (containing phenyl, methyl and vinyl), low compression permanent deformation (containing methyl and vinyl), low shrinkage (de-volatilized), and solvent-resistant (fluoro-silicone rubber) and so on.

Room termperature curing polysilazane, pls check IOTA 9150, IOTA 9150A. 
High termperature curing polysilazane, pls check IOTA 9108, IOTA 9118.