ExSil® 100 (EM2-EX100): High Elongation Elastomer – Molding Grade
ExSil® 100 is a two-component ultra high elongation silicone elastomer with tear-resistant properties.
Features and Benefits:
- Self-sealing
- High elongation
- High recovery
- Low extractables
- High tear strength
- Flowable and moldable
- High oxygen permeability
- Long-term thermal stability
Applications:
- Diaphragms
- Microfluidics
- Vibration damping
- High performance seals
- Septa with easy penetration and good resealability
- Optical and electrical interconnects
Sample before stretching
Sample elongation
The stretched sample exhibits shape recovery
Note: The values below are typical and are not intended for use in preparing specifications. Please contact a Gelest representative when writing specifications.
| Cured Properties | Value | Units |
|---|---|---|
| Elongation | 5,000 | % |
| Tensile strength | 6-7 | MPa |
| Tear strength | 42 | kN/m |
| Elongation at tear failure | 2,000 | % |
| Durometer | 15 | Shore A |
| Specific gravity (part A) | 1.12 | g/mL |
| Refractive index (nD25) | 1.41 | |
| Volatiles (4 hr/150 °C) | ≤ 0.1 | wt% |
| Critical surface tension | 23-24 | mN/m |
| Contact angle, water | 105-100 | ° |
| Volume resistivity | 2.90 x 1014 | ohm*cm |
| ExSil® 100 Part | Viscosity (cSt) |
|---|---|
| Base (Part A) | 12,000-14,000 |
| Activator (Part B) | 800-1,000 |
| Activated Mix | 12,000-14,000 |
| Silicone Elastomer | Extractables (wt%) |
|---|---|
| Resin reinforced silicone | 4.2 |
| Silicone, 100 °C strip | 3.1 |
| ExSil® 100 | 0.2 |
Stress strain curves of ExSil® 100 compared to resin reinforced silicone
TGA thermograms of ExSil® 100 compared to resin reinforced silicone
Heat aging of ExSil® 100 compared to resin reinforced silicone
ExSil® 100 microfluidic device with filled channels showed no device failure during tortuous extension
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. The pot-life is 24 hours at 25 °C. Avoid entrapping air during transfer and casting. Cure at 100 °C for 8 hours or at room temperature for 72 hours. ExSil® 100 can be self-bonded by exposure to oxygen plasma and pressing surfaces together in a dry atmosphere