Description 

RTV-2 silicone rubber is a two-component material, this kind of silicone rubber consists of Part A base silicone and Part B CA30 curing agent, and Part A base silicone and Part B curing agent can cure at room temperature by a condensation reaction. These materials can be cast into the cured silicone molds: plaster polyurethane, PU, GRC, cement, resin, polyester, wax etc...

 

Features

1. Good flowability and long working time

2. Medium hardness

3. High tear and tensile strength

4. Easy de-mould from complex replica parts

5. Acid and alkali-resistance

6. Low linear shrinkage

 

Applications

MCSIL-2020/2025/2030 silicone rubber is suited for reproduction of middle size cement molds, concrete stones, artificial stones, plaster molds, figures, art objects, decoration molds, GRC products, gypsum products, resin products, PU molds. Etc...

Customers need to choose the suitable hardness according to the complex degree of plaster products.

 

Technical datasheet

Base and Curing Agent Mixture (100:2 by weight) in 25 ℃(77F) testing

Item No.	MCSIL-2030
Color	white
Curing agent	CA30
Mixing ratio	100:2
Mixed viscosity	24000-25000 cps
Pot life	30-40 Minutes
Curing time	4-6  Hours
Hardness	28-30 Shore A
Tear Strength	30 N/mm
Tensile Strength	3.8 MPA
Relative density	1.15 g/cm³
Shrinkage	≤0.3%
Elongation at break	480%

Pouring and brushing on silicone are both available.

 

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℃ (95℉).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 Plaster Decoration Mold Making Silicone Rubber

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

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

 

Storage of Plaster Decoration Mold Making Silicone Rubber

When the silicone rubber is stored at or below 30 C (85F) in the original unopened containers, RTV2 Base and CA30 Curing agent have a usable life of 9 months from the date of production.

 

Note of Plaster Decoration Mold Making Silicone Rubber

RTV2 silicone rubber is an industrial product and must not be used in food molding, dental human skin molding applications.

 

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

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

Tel: 86-15874272919

Skype:nicoleszmc

MSN: nicoleszmc (at)hotmail(dot)com