China RTV Liquid Silicone Rubber

RTV Silicon(HY-620# & HY-640#) applications
RTV Molding Silicon(HY-620# & HY-640#) is maily used in Concrete, soap, Toys, ceilings, gift, house decoration, plate engrave, sculpture replica, arts & crafts, resin crafts, poly resin crafts, unsaturated resin crafts, candle crafts, plastic crafts, heritage copying, plaster crafts, Buddhist statue, crafts cement products, plastic toys, handicrafts, stationery, sculpture, reproduction of cultural relic, shoe sole molds, and so on.
RTV Molding Silicon(HY-620# & HY-640#) features
HY-620 and HY-640 are particularly suitable for pouring mould. HY-620 is for small crafts mould making, while HY-640 is for large crafts mould making. Common features of HY-620 and HY-640: Light viscosity, good fluidity, easy-operation, good tension and high tear strength.
HY-628 and HY-638 are particularly suitable for brushing mould making. Common features of HY-628 and HY-638: Moderate viscosity, easy-operation. Agents are available if requested. It won't affect the quality of silicon rubber but to make the operation much easier.
Frequently asked questions of RTV Molding Silicon(HY-620# & HY-640#)
Why is the appearance of the finished mold striate and unsmooth?
It is because the appearance of the product or the model itself is not perfect, and it has not been polished before the further operation. So when you make silicon molds, firstly you should Polish the product, spray the mold spray evenly on the product. In this case, the problem can be avoided.
Anymore information about RTV Molding Silicon(HY-620# & HY-640#), please feel free to contact us anytime.

Model AppearanceViscosity
(cps)Hardness
(Shore A0)Tensile-strength (kgf/cm2)Tear-strength (kgf/cm)Elongation(%)
Mixing Ratio (%)Operating
Time(h)
Demould Time
(hrs)620 18-2220.52-4628 25-3020.52-4638 35-4020.52-4640 38-4020.52-4718 16-2020.52-4728 25-3020.52-4738 35-4020.52-4

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