Dongguan Guochuang Organic Silicone Material Co., Ltd.
Plaster Molding Silicone, Furniture Molding Silicone, Prototyping Silicone, Crafts Molding Silicone, Restoration Molding Silicone, Manufacturer and Supplier - China
Free sample rtv2 mould making silicone rubber for Architectural Molding (1)
Free sample rtv2 mould making silicone rubber for Architectural Molding
Architectural Molding Silicone
Product No.: C-825 and C-830?
Brand: GuoChuang Silicone?
Application: Making molds for brackets, panels, cornice moulding, statuary etc.?
Keyword: mold making silicone rubber, rtv2 silicone rubber, liquid silicone rubber,s liquid silicone for molding
Architectural Reproduction and Restoration specialists use GC liquid mold silicone rubbers to make site molds of aging/damaged ornate architectural elements (e.g., brackets, panels, cornice moulding, statuary). From these molds, reproductions of damaged elements can be cast in the controlled environment of a mold shop. These imperfect castings are resculpted to their original beauty so a rubber production mold can be made from this revised model. This production mold allows repeated casting of the new architectural element in concrete, glass fiber reinforced concrete, plaster, plastic, fiberglass, or other casting media as required for interior or exterior mounting.
C-825/C-830 room-temperature curing silicone rubber are popular mold materials for this application and are available in pourable, brushable and sprayable options.
C-825/C-830 is A tin-cured silicone rubber with a 100A:3B mix ratio (digital scale required to measure) and a demold time of 3-4 hours. Tin-cured silicones are slightly less expensive than platinum-cured silicones, but have a shorter library life and shrink slightly on cure.
Typical general characteristics ?Inspection Method Value
Product data (Catalyzed A+B) C-825 C-830
Hardness Shore A 25±2 30±2
Mix Ratio A:B 100:3 100:3
Color / White White
Pot life 25 °C (77F) 30-40mins 30-40mins
Curing time 25 °C (77F) 3-4 hours 3-4 hours
Mixed viscosity mPa.s 20000±1000 23000±1000
Tear-strength kg/cm 22±2 23±2
Tensile-strength M.pa 4.0±0.5 5.0±0.5
Elongation % 450±50 460±50
Shrinkage % ?0.3 ?0.3
Note: This is a 100A:3B mix ratio product that must be measured by weight.