1) Dimethyl silicone rubber
Dimethyl silicone rubber can be called methyl silicone rubber, dimethyl silicone rubber is colorless and transparent elastomer, dimethyl silicone rubber vulcanization activity is low, high temperature compression permanent deformation is large, not suitable for the system of thick products, thick products vulcanization is more difficult, the inner layer is easy to blister.
Used in the range of -60 ~ 250 ℃, due to methyl vinyl silicone rubber compared to dimethyl silicone rubber in the performance of the above better, so now dimethyl silicone rubber has been gradually replaced by methyl vinyl silicone rubber. The earliest production of a silicone rubber. Vulcanization can not use sulfur yellow, commonly used organic peroxide (such as dibenzoyl peroxide) as a vulcanizing agent. Can be produced by high-purity dimethyl dichlorosilane (CH3) 2SiCl2 by hydrolysis and polycondensation. Properties and uses similar to silicone rubber.
(2) methyl vinyl silicone rubber
As the introduction of a small amount of vinyl in the macromolecular structure of silicone rubber can greatly improve the vulcanization and processing properties of silicone rubber, so in the current application of silicone rubber, most of which contain vinyl. Methyl vinyl silicone rubber is one of the most versatile types of silicone rubber and currently dominates the production of silicone rubber at home and abroad. Due to its introduction of partially unsaturated vinyl on the side chain, so that its processing properties and physical and mechanical properties are better than dimethyl silicone rubber. In addition to the general characteristics of dimethyl silicone rubber, it also has a wide range of operating temperatures, can be in the range of -60 ~ 260 ℃ to maintain good elasticity, it is easier to vulcanize than dimethyl silicone rubber, has a smaller compression permanent deformation, better resistance to solvent expansion and resistance to high-pressure steam stability, as well as excellent cold resistance, etc., but also because of the use of less reactive peroxide vulcanization, thereby reducing the number of Vulcanization of air bubbles and rubber stability weaknesses. Therefore, the general use of methyl vinyl silicone rubber can be made with a greater thickness of products. 
Methyl vinyl silicone rubber is the most widely used varieties of silicone rubber, in recent years the emergence of a variety of high-performance and special-purpose silicone rubber, most of them are vinyl silicone rubber as the base rubber, such as high-strength silicone rubber, low compression permanent deformation of the silicone rubber, do not need to be vulcanized silicone rubber, heat-resistant, conductive silicone rubber and medical silicone rubber. Methyl vinyl silicone rubber in the aviation industry, widely used as gaskets, sealing materials and fragile, shockproof parts of the protective layer; in the electrical industry can be used as electronic components and other high-level insulating materials, high-temperature potentiometer dynamic sealing ring, underground long-distance communication equipment sealing ring; in medicine, due to the physiological reaction of methyl vinyl silicone rubber on the human body is small, non-toxic, so it is used as a surgical orthopedics, artificial heart valves, blood vessels, etc.. In medicine, due to the small physiological reaction of methyl vinyl silicone rubber to the human body, non-toxic, it is used for surgical plastic surgery, artificial heart valves, blood vessels, etc.
(3) methyl phenyl vinyl silicone rubber
According to the silicon rubber in the phenyl content (phenyl: silicon atom) of different, can be divided into low-phenyl, phenyl and high phenyl silicone rubber. When the rubber crystallizes or approaches the glass transition point, or when the two conditions overlap, it causes the rubber to appear hard. The introduction of a moderate amount of bulky groups disrupts the regularity of the polymer chain and can lower the crystallization temperature of the polymer. At the same time, the introduction of bulky groups alters the molecular building forces of the polymer, and therefore can also alter the glass melting temperature. Low phenyl silica, i.e., excellent low temperature resistance for the above reasons, is independent of the type of phenyl monomer used. Vulcanized rubber with a brittleness temperature of -120°C is the rubber with the best low-temperature properties. Low-phenyl silicone rubber has the advantages of vinyl silicone rubber and is not very costly, so there is a tendency to replace vinyl silicone rubber. Medium phenyl silicone rubber has ablative resistance and high phenyl silicone rubber has excellent radiation resistance. Generally speaking, with the increase of phenyl content, the rigidity of the molecular chain of silicone rubber gradually increases, and the low temperature resistance of silicone rubber gradually decreases, but with the increase of phenyl content, it improves the ablative resistance and irradiation resistance of vulcanized rubber.
Methyl phenyl vinyl silicone rubber is the aerospace industry, cutting-edge technology and other sectors of the national economy, one of the important materials, can be used to make a variety of molded and extruded products used as cold-resistant rubber for the aerospace industry and used for ablative, heat aging or radiation-resistant parts of the seals, pads, tubes and rods and so on.
(4) Fluorosilicone rubber
Fluorosilicone rubber refers to γ-trifluoropropyl methyl polysiloxane. Fluorosilicone rubber has excellent resistance to chemicals, solvents and lubricant resistance, this silicone rubber in non-polar solvents in the expansion rate is small, cold resistance and thermal stability is good, resistance to ignition is also good, so in aircraft, rockets, missiles, cosmic flight, petrochemicals, used as fuel oil and lubricating oil contact hose, gaskets, seals, fuel tanks, etc., but also used to make corrosion-resistant clothes, gloves and coatings, Adhesive and so on.

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