rtv2 liquid silicone rubber mold making for plaster gypsum decorative molds
RTV-2 mold making silicone rubber is generally named as two-part silicone rubber that vulcanizes at room temperature. Part A is a flowable liquid, part B is the catalyst.
rtv2 silicone rubber C-820 for plaster gypsum mold casting
1.Good characteristics of easy-operation
2.Light viscosity and good flowability
3.Low shrinkage
4.Favourable tensile and tear strength
5.High-temperature resistance, acid and alkali-resistance
6.High duplication times
7.Vulcanize at room temperature
8.Easy for demoulding
9.No smell ,non-flammable ,safe and reliable
Product Technical Parameters
| Item | Parameter |
| C-820 | |
| Viscosity(cps) | 16000±500 |
| Hardness(A°) | 20±2 |
| Tensile Strength(kgf/cm²) | 36±2 |
| Tear Strength(KN/M) | 20±1 |
| Elongation(%) | 400±50 |
| Shrinkage Rate(%) | 0.3% |
| Mixing Ratio | 100:2 |
| Life Time(Min) | 20~30 |
| Curing Time (hr) | 2~3 |
| Temperature(℃) | 25 |
Product Application
Making molds for
• Artificial stone products molding,Wax casting
• Lighting & candles crafts,stationery gifts,crafts industry
• Making molds for gypsum,GRC,concrete,resin products etc
• Casting for Statue,Buddha,Christmas ornaments,sculptures,figures etc
• Unsaturated rein crafts,epoxy resin crafts, poly resin crafts,polyester resin
• Decoration building mold making (cornice,column, balustrade, ceiling, pedestals,fountains, mantels, wall ornament, planter,furniture decorative etc.
How to use the silicone rubber
Step One: Prepare and clean the prototype. You must make sure your original moulds perfect.
Step Two: Mixing part A and part B evenly. Take 100g of part A and add 2g of part B and mix the silicone rubber and curing agent evenly.
Step Three: Vacuum pumping. Without exception, this step takes less than 10 minutes. Otherwise, it will cause a cross-linking reaction, and no further steps will be available.
Step Four: Pouring cast or brushing cast. After released the bubble, we can pour/brush the silicone rubber on the prototype
Pouring cast:
It is suitable for simple products with a smooth surface. Without any mould lines, which helps you save time and is easy for operation. Evenly and slowly pouring the mixed silicone rubber into the square frame. After the cross-linking reaction and the silicone rubber turns dry, you can take the products out. Thus, the mould has been done.
Brushing cast:
- Evenly brush the mixed silicone rubber on the product which is covered with mould spray with a brush or a brush pen.
- After the cross-linking reaction (about 30 minutes), brush a second coat which can increase the tension and tear strength of the mould.
- Cover a glass cloth on it after another 30 minutes of a second cross-linking reaction, and use a brush pen or a brush to avoid any interstices.
- Cover a third coat.
Product Storage
1. It is a kind of non-dangerous goods. This product should be sealed and placed in a cool and dry place which should keep from sunlight and rain .
2. Especially note that the silicone should not touch or mix with compounds including nitrogen, phosphorus, sulfur, tin, lead or metal organic acid.
3. Addition cure Silicone RTV-2 is an environmentally-friendly liquid silicone product is not easy to burn which can be stored and transported as non-hazardous goods.
4. The shelf life is 12months from the date of production.
It can be reused after reinspection when it exceeds the storage period.
Related Products
tin cure 20 shore a silicone rubber is high strength and long life time for plaster mold making.it is light viscosity and good flowability for molding and easy for demoulding.
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