PlatSil FS-20 (Fast-Setting) Silicone Rubber is a two-part, platinum-catalysed, liquid silicone system that cures (RTV) to a milky white, Shore A20 rubber. This product offers a simple 1A:1B mix ratio (by weight or volume), a fast demold time of 25 minutes, and a long pour time (8 minutes) relative to its cure speed. This allows for fast turn-around of moulds and parts with sufficient time to mix and pour. Heat can be used to further accelerate the cure.
FS Stands for Fast Set NOT Food Safe.
Advantages :
- Low viscosity for excellent reproduction of details and easy degassing
- Easy mix ratios – can use with dispensing machines
- Cure at room temperature or accelerate with heat
- Easy release properties –save on release agents
- High tear strength – fewer prematurely torn moulds
- Good chemical resistance for longer mould life
- Low/zero shrinkage for better dimensional reproduction
- Shore A hardness of 20
Physical Properties :
| PlatSil FS-20 | Unit |
| Mix Ratio By Weight | 1A : 1B |
| Pot Life | 8 mins |
| Demould Time @ 25°C | 25 mins |
| Mix Viscosity (cp) | 3800 |
| Shore A Hardness | A20 |
| Specific Gravity | 1.11 |
| Elongation At Break (%) | 626 |
| Tear Strength (psi) | 467 |
| Tensile Strength (kN/m2) | 4 |
| Cure Colour | Milky |
MB Fibreglass believes that the information above is an accurate description of the typical characteristics and/or uses of the product or products, but it is your responsibility to thoroughly test the product in its specific application to determine performance, efficacy and safety.
Inhibition of Cure
Great care must be taken when handling and mixing all addition-cured silicone elastomer systems, that all the mixing tools (vessels and spatulas) are clean and constructed in materials which do not interfere with the curing mechanism, do not use wood and paper mixing utensils. The cure of the rubber can be inhibited by the presence of compounds of nitrogen, sulphur, phosphorus and arsenic; organotin catalysts and PVC stabilisers, epoxy resin catalysts and even contact with materials containing certain of these substances e.g.. moulding clays, sulphur vulcanised rubbers, condensation cure silicone rubbers, wood, paper, cardboard, onion and garlic.
