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Photos 1 Introduction 2 704 Silicone Rubber 3 TM-441 sealing glue 
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Sealant of RTV silicone rubber (room temperature vulcanization type silicone rubber), also called Silicone Copper Rubber, as a bonding, sealing, insulation, moisture-proof, shockproof materials, is widely used in electronic components, semiconductor materials, bonding and sealant for electronic and electrical equipment, waterproof and sealant for electronic instruments and electric heaters, as well as encapsulation of electronic components, etc. Specifically such as the sealing of the end of the electrical heating elements.
Sealant of RTV silicone rubber is a kind of room temperature vulcanized silicone rubber. RTV is the abbreviation of ‘room temperature vulcanized silicone rubber,’ which can be vulcanized at room temperature. Usually, its molecular chain contains hydroxyl, vinyl, and other reactive groups at both ends, and its molecular weight is relatively low.
There are two kinds RTVs, one-component RTV, and two-component RTV.
RTV silicone rubber (room temperature vulcanized silicone rubber) is a milky white viscous liquid prepared by the compounding of silicone rubber, cross-linking agents and fillers, etc. RTV silicone rubber is a solvent-free, non-corrosive one -component room temperature vulcanized silicone rubber
Long storage period, stable performance, able to bond common metal and non-metal materials, so it is suitable for bonding and sealing between various metals and metal with non-metal materials. Good adhesive performance, excellent electrical insulation properties of the dried material, moisture-proof and shock-proof properties. Non-toxic, non-polluting, non-corrosive. In addition, good electrical insulation and anti-arc performance, resistance to degradation, moisture resistance, and good adhesive performance. Suitable for working temperature of -50℃~200℃.
Sealant of 704 silicone rubber (silicone chemical formula SiO2-xH20 or mSi2-nH2) is a good adhesive, high strength, non-corrosive one-component room temperature vulcanization silicone rubber. With excellent electrical insulation and sealant performance as well as degradation resistance. It can be used for an extended period from -50℃ to +250℃.
704 room temperature vulcanized silicone rubber not only has outstanding high and low-temperature resistance, degradation resistance, excellent electrical insulation, resistance to moisture and vibration, and excellent adhesive properties, but it can also be used extensively to bond a wide range of metals, non-metals, plastics, and rubbers. It is an ideal material for sealing heat-resistant devices with excellent high-temperature resistance. Suitable for insulation and sealant for household electronic and electrical appliances, electrical insulation protective coating, and point plug sealing purposes. It can also be used for TV line output transformer component repair, moisture sealant for high voltage cap between hook springs, anti-ignition, and arc extinguishing. Also used in neon light transformers, energy-saving lamp components on electric heating tubes, electric rice cookers, electric irons, and bonding insulation seals of electric heating equipment.
During the drying process, within 24 hours (room temperature and 55% relative humidity), the adhesive will dryto a depth of 2~4 mm. If the location of the part is deeper, especially parts that are not contactable to the air, it will take longer to dry completely. If the surrounding temperature is lower than room temperature, the drying time will also take longer to be completed. Before further processing or packaging of the bonded parts, it is recommended that the user wait long enough for the bonding to remain solid and intact.
After an operation has been completed, the unused glue should be immediately sealed, and the cap tightened for storage. Upon subsequent usage, if there are crusts around the seal, it can be promptly removed, and typical use of the glue is not affected. In the process of storage, there may be a small amount of curing at the tube’s opening, which can be removed, and the glue can be used normally with the performance of the product unaffected.
The sealing glue is made of single component, non-toxic, solvent-free, non-polluting, non-corrosive, temperature resistance: -60 ~ +300 ℃, after exposure in the normal temperature, contacting a little moisture in the air, it will become solide. With excellent electrical insulation and arc resistance, it is specially used for bonding, sealing, insulation for electric heaters, steam iron and electronic appliances.
The performance of the glue is equivalent to the Japanese 441 glue, especially has a strong adhesion for the wall of metal pipe. For the electric heater, it not only can solve the problem of cracks which caused by electroplating polishing, but also can eliminate fundamentally a series of problems of getting damp, fake sealing, bubbles, decreasing of insulation resistance.
Implementation standard: Q / 320481 HDG001
Smear the sealing compound at the end of the heating elements, then leave it, after 7~8 hours, it becomes solid. The thickness of the sealed compound shouldn't be more than 3mm.
