RTV 638 Silicone Rubber for crafts moulds

1.Usage of rtv 638 silicone rubber:
rtv 638 silicone rubber is used for toy gifts and craftwork gift, products with
complex fine details, and made in pouring way.
.
2.Description of rtv 638 silicone rubber:
  rtv 638 silicone rubber is mainly used for toy gifts and craftwork gifts with
the advantages of good tensile strength, high tear strength, high temperature
resistance, high duplication times and repeated use, etc. It is suitable for
small products or fine and precision products which is difficult to demould.
This silicone rubber is one of the products with the highest use level in the
production of craftwork gifts and the shrinkage is up to 0.2%.
.
3.Applications of rtv 638 silicone rubber:
Poly technique, lightings, candles, and  molds in multiple pieces for large
products.
.

4.Operation Instruction for 638 Molding Silicone Rubber:
rtv 638 silicone rubber is a white or red flowing liquid with general hardness
of 2250A°after curing . If the customer wants to make large products and large
size molds, the mold should be made of silicone 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 demould,
more curing agent is needed; contrarily, if molds requiring slower drying and
demould, less curing agent is needed.
(Note: our company does not recommend you to add silicone oil. If a special soft
silicon mold or fine detailed and complex patterns products are required, 5%-10%
silicone oil can be added to soften the mold for easy demould.)
 
5.The proportions and reactions of the curing agent and the RTV silicone rubber are listed
as follows:
a. Adding curing agent 1%, the silicone can still be operated within 2.5 hours
and can be demoulded after 6-8 hours.
b. Adding curing agent 2%, the silicone can still be operated within 50 minutes
to 1 hour and can be demoulded after 2-3 hours.
c. Adding curing agent 3%, the silicone can still be operated within 28 - 30
minutes and can be demoulded after 1.5-2 hours.
d. Adding curing agent 4%, the silicone can still be operated within 10 - 15
minutes and can be demoulded after 1 -1.5 hours.

Any further information required of RTV 638 Silicone Rubber for crafts moulds, pls feel free to contact Ms Kaimi

Mobile: 0086-18938867528

Tel:  0086-755-89212369

Fax: 0086-755-89948030

E-mail: hyju(at)szrl(dot)net

Website: www(dot)szrl(dot)net