Omnisil – Easy to Measure, Easy to Mix and Easy to Pour into Molds
| Shore A Hardness | 32 – 34 |
| Mix Ratio by Weight | 10:1 |
| Rubber Shrinkage | 0.0% |
| Viscosity | 8,500cps |
| Cure Time | 7 – 8 hours |
| Rapid Cure Time @120°F / 50°C | 60 – 120 mins |
| Specific Gravity | 1.12 |
| Elongation Before Break | 370% |
| Tensile Strength Before Break | 4.8 n/mm2 |
| Tear Strength Die C Before Break | 15.5 n/mm2 |
| Colour | Clear |
New Omnisil makes strong, tough, tear resistant silicone rubber molds that retain their memory and do not become softer over time.
Omnisil is a transparent two part 0% shrinkage, 10:1 mix ratio RTV Silicone molding rubber that cures at room temperature and cures even faster at slightly warmer temperatures. Normal cure time is 7-8 hours, faster cure of 1-2 hours is possible at 50ºC /120ºF.
Omnisil – Easy to Measure, Easy to Mix and Easy to Pour into Molds
Omnisil is easy to measure, mix and pour.
The following is only a guide, the mass of your model will increase or decrease the amount of rubber needed.
| Mold Size | 0.75”/ 19 mm | 1.00”/ 25 mm | 1.25”/ 32 mm | 1.50”/ 38mm |
| Part A | 11.0g | 14.0g | 19.0g | 21.0g |
| Part B | 110.0g | 140.0g | 190.0g | 210.0g |
| Total | 121.0g | 154.0g | 209.0g | 232.0g |
*Shrinkage rates given are for the rubber mold itself. Final casting shrinkage rates depend on moldmakers and caster’s skill, knowledge, precision and attention to detail.
** Specific gravity. Water = 1.00. Low specific gravity = more molds per pound/kg.
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