RTV Silicone for Stone Mold Making

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Product detail:

Introduction of RTV Silicone for Stone Mold Making

 

RTV Silicone is a kind of two-component material. The silicone is made up of Part A base silicone and Part B CA curing agent. The Part A base silicone and Part B CA curing agent can cure at room temperature by a condensation reaction, after full cure, it become a cured silicone mold. The silicone mold can be cast the following materials for reproduction: plaster, polyurethane, PU, GRC, cement, resin, polyester, wax etc...

 

Specifications of MC RTV-2 Silicone Rubber

 

Equiped with REACH certificate 

Professional technician with rich experience 

4% catalyst is offered for free of charge  

Silicone range:10-60 shore A  

High duplicating silicone molds(500-600)

  

Applications of RTV Silicone for Stone Mold Making

  

MC RTV2088 silicone rubber is especially for the moldmaking of manufactured stone,artificial stone or cultural stone.

  

Datasheet of RTV-2088 Silicone  for Stone Moldmaking

 

Item	RTV 2088
Color	Liquid white
Curing agent	CA30
Mixing ratio	100:2
Mixed viscosity	25000~26000 cps
Working time	20-30 mins
Curing time	2-3 Hours
Hardness	32-34 Shore A
Tear Strength	29 N/mm
Tensile Strength	≥3.6 Mpa
Relative density	1.11~1.15g/cm3
Elongation at break	380%
Methods of molding	Brushing/Pouring

 

 

 

How to make the silicone mold?

 

1. Preparing

 

The surface of the original objects should be clean and free of loose material. If your products have thin flower patterns, and especially have porous substrates, please use a suitable mold release agent such as soap water, detergent, Vaseline or petroleum jelly.

 

2. Mixing

 

Please weigh Part A silicone base and part B CA30 Curing Agent with ratio of 100:2 into a clean container. Stir Part A base silicone thoroughly before use, then Mix Part A and Part B evenly until the curing agent completely dispersed in the silicone base. Manual or mechanical mixture can be used, but do not last much time or allow the temperature to exceed 35°C (95°F).it’s suitable to mix small quantities to ensure thorough mixture of silicone base and curing agent.

Note: It is strongly recommended that entrapped air be removed in a vacuum chamber, allowing the mixture to completely expand and then collapse. After a further 1 to 2 minutes under vacuum, the mixture should be inspected and can be used if free of air bubbles. A volume increase of 3-5 times will occur on vacuum de-airing the mixture. So a suitably large container should be chosen.

 

3. Pouring the mixture and curing

 

Pour the mixed Part A base silicone and CA-30 curing agent as soon as possible onto the original object, avoiding air entrapment. The catalyzed material will cure to a flexible rubber within 6 hours (or faster by different mixing ratio or room temperature), we advice you de-mold after 24 hours, it is will improve the replicate times of silicone mold.

 

Packing of RTV Silicone for Stone Mold Making 

 

Part A base silicone: 20kg/drum, 25kg/drum or 200kg/drum

Part B CA30 Curing Agent: 0.25kg/bottle,1kg/bottle and 10kg/bottle

 

Storage of RTV Silicone for Stone Mold Making 

 

When the RTV-2 silicone rubber is stored at or below 30 C (85F) in the original unopened containers, Silicone Base and CA30 Curing agent have a usable life of 12 months from the date of production.

 

Note of RTV Silicone for Stone Mold Making 

 

RTV2066&RTV2088 silicone rubber is an industrial product and must not be used in food molding, dental human skin molding applications.

 

FOQ of silicone rubber stone molds

 

 

Why does the RTV liquid silicone rubber for molding have few mold making 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

 

 

 

The information above is just for reference, if you're interested or have any questions, please feel free to contact Nicole:

Web:www(dot)mcsilicone(dot)com

E-mail:nicole(at)mcsilicone(dot)com

Skype:nicoleszmc

MSN: nicoleszmc (at)hotmail(dot)com