SYLGARD 186
Harmonization Code : 3910.00.00.90 | Silicones in Primary Forms; Others
Main features
- 10:1 Meter-Mix Processing
- 255% Cured Elongation
- 100 ppi Tear Strength
Product Description
SYLGARD 186 Silicone Elastomer combines a two-part, 10:1 mix silicone system with room-temperature and heat-cure options to form a translucent, flexible encapsulant. Its high-viscosity mixed state and 1.65-hour working time support controlled potting and encapsulation of electrical assemblies, including power supplies, sensors, transformers, relays and solar-cell components. After cure, the material combines 255% elongation, 100 ppi Die B tear strength and electrical insulation properties. It can be processed by automated metered mixing and dispensing or by manual mixing, with de-airing selected based on part geometry and process needs.
Key features
- 10:1 mix ratio: Supports manual or automated metered mixing and dispensing.
- Flexible cured elastomer: Typical elongation is 255% with Shore A 24 hardness.
- High tear strength: Typical Die B tear strength is 100 ppi after cure.
Applications
General potting and encapsulation of power supplies, connectors, sensors, controls, transformers, relays and related electrical assemblies.
Technical Specifications
General Properties
Mechanical Properties
Electrical Properties
Additional Information
As-supplied / before-processing properties
Typical values for the base and mixed material. Values are not specifications.
| Property | Value | Unit | Method / condition |
|---|---|---|---|
| Mix ratio | 10:1 | Base to curing agent | |
| Base viscosity | 123800 | cP | Part A or base |
| Mixed viscosity | 66700 | cP | Thoroughly mixed material |
| Working time | 1.65 | hr | At 25 deg C; pot life |
| Heat-cure time | 25 | min | At 100 deg C |
| Heat-cure time | 15 | min | At 125 deg C or 150 deg C |
| Shelf life | 12 | months | Stored at 25 deg C |
After-processing / final-state properties
Typical cured properties. Mechanical and electrical values apply to the cured elastomer under the stated test conditions.
| Property | Value | Unit | Method / condition |
|---|---|---|---|
| Specific gravity | 1.12 | Cured material | |
| Tensile strength | 305 (2.1) | psi (MPa) | Typical cured value |
| Elongation | 255 | % | Typical cured value |
| Tear strength, Die B | 100 (70) | ppi (N/cm) | Typical cured value |
| Durometer hardness | 24 | Shore A | Typical cured value |
| Dielectric constant | 2.70 / 2.68 | At 100 Hz / 100 kHz | |
| Volume resistivity | 4.98E15 | ohm cm | Typical cured value |
