Gelest® xPDMS 2-Part High Elongation Reprographic Silicone Elastomer (100:1 kit) (PP2-RG09)
Gelest® xPDMS is a flexible, translucent molding and encapsulation compound with significantly higher elongation than conventional silicones. Gelest® xPDMS also has a greater amount of self-sealing compared to conventional silicone RTVs, allowing for mechanical penetration of cannulae and optical fibers as well as electroactive interconnects.
Note: The properties reported are typical values and are intended as a guide for design and not intended for use in establishing specifications.
| Cured Properties | Value | Units |
|---|---|---|
| Mixed ratio A:B | 10:1 | |
| Viscosity, uncured mix | 12,000-14,000 | cSt |
| Viscosity, part A | 12,000-14,000 | cSt |
| Viscosity, part B | 800-1,000 | cSt |
| Elongation | 4,000-6,000 | % |
| Durometer | 10-15 | Shore A |
| Refractive index | 1.41 | |
| Volatiles (4h/150 °C) | ≤ 0.1 | wt % |
| Critical surface tension | 23-24 | mN/m |
| Specific gravity | 1.12 | g/mL |
| Tear strength | 40.0-42.0 | kN/m |
| Contact angle, water | 105-110 | ° |
| Elongation at tear | 2,000 | % |
Thoroughly mix Part A and Part B in a 100:1 ratio. Try to avoid introducing bubbles. For critical applications, de-air mix under vacuum for about 20 minutes. The pot-life is 24 hours at 25 °C. Avoid entrapping air during transfer and casting. Cure at 80 °C for 4 hours or at room temperature for 36 hours.