Silicone rubber for mold making applications
Silicone rubber for mold making is primarily intended for poly resin crafts, PU crafts, PU resin crafts ,gypsum crafts ,unsaturated resin crafts, lighting and candles crafts ,plastic toy , stationery gifts crafts industry, a large statue Buddha, furniture, furniture decorative materials, statues Buddha, artifacts copied, building decoration materials, large-scale cement mold, artificial fossils Factory, Europe component factory, simulation landscapes, animals and plants sculpture, sandstone crafts and so on.

Silicone rubber for mold making features description
Silicone rubber for mold making is white or red flowing liquid with general hardness of 22-50A°after curing. Molding silicon rubber is a kind elastic silicon rubber mold which features with resistance to deformation, high-temperature, acid-alkali and expansion as well as high reproduction times, good tensile strength, tear strength and elongation.
1 good flowability, light viscosity, easy operation
2 low shrinkage
3 good tension and tear strength
4 no deformation
5 high temperature resistance, acid & alkali resistance and aging resistance

Silicone rubber for mold making datasheets
Model: 625# silicone rubber for mold making
Appearance: white
Viscosity (cs): 17000-20000
Hardness (A): 24-26
Tensile strength(kgf/cm2 ) ≥32
Tear strength (kgf /cm):≥28
Elongation break(%):≥500
Retractility (%):≤0.2
Curing agent mixed rate (%):2-3
Operate time (min): 30
Curing time (hours): 2-4

Model: 628# silicone rubber for mold making
Appearance White
Viscosity (cs) 12000~15000
Hardness (Ao) 50~80
Tensile Strength (kgf/c?)=7
Tear Strength (kgf/cm)=3
Shrinkage (%) =0.3
Elongation (%) =200
Mixing ratio (%) 2~3
Operating Time(H) 0.5
Curing Time(H)2~4

Model: 630# silicone rubber for mold making
Appearance: white
Viscosity (cs): 19000-25000
Hardness (A): 28-32
Tensile strength(kgf/cm2 ) ≥35
Tear strength (kgf /cm):≥30
Elongation break(%):≥470
Retractility (%):≤0.2
Curing agent mixed rate (%):2-3
Operate time (min): 30
Curing time (hours): 2-4

Model: 638# silicone rubber for mold making
Appearance: white
Viscosity (cs): 30000-33000
Hardness (A): 30-32
Tensile strength(kgf/cm2 ) ≥40
Tear strength (kgf /cm):≥32
Elongation break(%):≥450
Retractility (%):≤0.2
Curing agent mixed rate (%):2-3
Operate time (min): 30
Curing time (hours): 2-4

Silicone rubber for mold making operations
If the customer wants to make large products and large size molds, the mold should be made of silicon rubber with high hardness. On the contrary, if the mold with fine and precision patterns, it should be made of silicon with low hardness. The amount of the curing agent depends on the actual requirements of the customer. If molds requiring fast drying and demolding, more curing agent is needed; contrarily, if molds requiring slower drying and demolding, less curing agent is needed.

(Note: our company does not recommend you to add silicone oil. If a special soft silicone mold or fine detailed and complex patterns products are required, 5%-10% silicone oil can be added to soften the mold for easy demold.)

Frequently asked questions of Silicone rubber for mold making
Why does the silicone rubber mold have few molding times?
The silicone rubber mold has few molding times is due to follwoing reasons: adding too much silicone oil which will destroy the molecular of silicone rubber; making the mold for small and fine detailed products with higher hardness silicone rubber which is easy to break; making the mold for large products with soft silicone rubber which will reduce the tensile and tear strength of the mold, and the mold will have deformation. Thus, we should take the proper silicone rubber to make the mold for suitable products.

Any questions, please feel free to contact Ms Jessica :
FAX: 86-0755-89948030
MOBILE: 86-18938867577
WEBSITE: www(dot)szrl(dot)net
E-MAIL: hysb(at)szr(dot)net