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Features of silicone Molds
RTV-2 Silicone Rubber for Soap Mold Making is a kind of two-component material, which consists of Part A base silicone and Part B CA30 curing agent; then the silicone base and curing agent can cure at room temperature by a condensation reaction. These materials can be cast into the cured silicone mold: plaster, polyurethane, PU, GRC, cement, resin, polyester, wax etc.
Technical parameter of silicone Molds
| Item No. | RTV 218 |
| Color | liquid white |
| Curing agent | CA30 |
| Mixing ratio | 100:2 |
| Mixed viscosity | 25000-26000 cps |
| Pot life | 20-30 mins |
| Curing time | 2-6 Hours |
| Hardness | 18-20 Shore A |
| Tear Strength | 29 N/mm |
| Tensile Strength | ≥3.8 Mpa |
| Relative density | 1.11-1.15g/cm3 |
| Shrinkage | ≤0.3% |
| Elongation at break | 380% |
| Methods of molding | Brushing/Pouring |
Characteristics of silicone Molds
1. Good flow ability and long working time
2. Medium hardness stone mold making
3. High tear and tensile strength
4. Easy de-mould from complex replica parts
5. Acid and alkali-resistance
6. Low linear shrinkage
Applications of silicone Molds
RTV215 and RTV218 silicone are suitable soap and candle mold making.
Instructions for Making Soap Silicone Molds
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 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.
The information above is just for reference, if you're interesting or have any questions, please don't hesitate to contact Berry:
E-mail: berry(at)mcsilicone(dot)com
Skype:berryszmc
MSN: berryszmc(at)hotmail(dot)com
