High Strength RTV2 White Liquid Silicone Rubber for Molds
Item No. |
Properties before curing |
Curing |
Part A |
Part B |
Part A+ Part B |
Pot life at 250C |
De-molding Time at 25ºC |
Appearance |
Appearance |
Ratio |
Viscosity |
MCSIL-2030 |
White |
Clear |
100:2 |
25000±20000 cps |
30-40 mins |
4-6 hours |
Properties after curing 24 hours |
Hardness Shore A |
Tear strength |
Tensile Strength |
Elongation break (%) |
Linear Shrinkage |
30 |
28-30 N/mm |
3.8 Mpa |
450-500 |
0.2-0.4% |
Brief Introduction of RTV2 silicones for decorative concrete molds
RTV2 silicone rubber is a two component material, and it consist of Part A base silicone and Part B curing agent. When the two parts mix together and pour or brush on a object, the silicone base and curing agent can cure to be a silicone mold at room temperature; And 24 hours later, the silicone mold can be released from the object, and then the silicone mold can be poured into the following material to copy: Plaster, polyurethane, PU, GRC, cement, resin, polyester, wax etc...
Procedures of RTV2 silicones for decorative concrete molds
1. Make sure the surface of the original is clean and free of loose material.
2. Weight 100 Part A base and 2 parts of CA30 Curing Agent in a clean container.
3. Stir Part A base silicone before use thoroughly, as filler separation may occur upon prolonged storage.
4. Mix Part A and Part B evenly until the CA30 completely dispersed in the base.
5. Pour the mixed Part A base silicone and CA-30 curing agent as soon as possible onto the original
6. De-mold after 24 hours, it is will improve the replicate times of silicone mold.
Note: It is strongly recommended that entrapped air be removed in a vacuum chamber, allowing the mix to completely expand and then collapse. After a further 1-2 mins under vacuum, the mix 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.
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