INSULCAST 987
Harmonization Code : 3506.91.90.99 | Prepared glues and other prepared adhesives, not elsewhere specified or included; products suitable for use as glues or adhesives, put up for retail sale as glues or adhesives, not exceeding a net weight of 1 kg ; Adhesives based on polymers of headings 3901 to 3913 or on rubber; Other ; Other
Main features
- Semi-Flexible Broad-Temperature Epoxy Potting
- 60,000 cP Mixed Viscosity
- -55 to 155 deg C Service Range
Product Description
INSULCAST® 987 Semi-Flexible Epoxy Potting Compound is a filled, semi-flexible, two-component epoxy potting compound for electrical and electronic assemblies operating across a broad temperature range. The neutral Part A and Part B are mixed at 2:3 by weight and produce a typical mixed viscosity of 60,000 cP with more than 48 hours of work life at 25°C. The system is heat cured and is documented for electrical insulation and physical durability. Typical cured properties include Shore D 65 hardness, 0.417 W/m·K thermal conductivity, 375 V/mil dielectric strength, and service from -55°C to 155°C.
Key features
- Semi-flexible epoxy: The filled cured material combines Shore D 65 hardness with broad-temperature service.
- Extended work life: Typical work life is greater than 48 hours at 25°C.
- Electrical insulation: Typical cured dielectric strength is 375 V/mil with 1 × 10¹⁴ ohm·cm volume resistivity.
Applications / Suitable for
- Electrical and electronic potting
- Broad-temperature encapsulation
- Heat-cured semi-flexible castings
TDS, SDS & Technical Documents
Technical Specifications
No specifications available.
Additional Information
As-supplied / before-processing properties
Typical as-supplied or processing-state values unless otherwise stated. These values are not sales specifications.
| Property | Value | Unit | Method / condition |
|---|---|---|---|
| Part A color | Neutral | N/A | As supplied |
| Part B color | Neutral | N/A | As supplied |
| Part A viscosity | 80,000 | cP | At 23°C |
| Part B viscosity | 50,000 | cP | At 23°C |
| Mix ratio | 2:3 | parts by weight | Part A : Part B |
| Mixed viscosity | 60,000 | cP | Typical |
| Work life | >48 | h | At 25°C |
| Cure options | 2 h at 120°C; 24 h at 75°C | N/A | Documented schedules |
After-processing / final-state properties
Typical cured or final-state values under the stated system and test conditions. These values are not sales specifications.
| Property | Value | Unit | Method / condition |
|---|---|---|---|
| Hardness | 65 | Shore D | ASTM D2240 |
| Coefficient of thermal expansion | 45 × 10⁻⁶ | 1/°C | Typical cured value |
| Thermal conductivity | 0.417 | W/m·K | Converted from 2.9 BTU-in/(ft²·h·°F) |
| Service temperature | -55 to 155 | °C | Documented range |
| Dielectric strength | 375 | V/mil | ASTM D149 |
| Dielectric constant | 4.9 | N/A | At 1 kHz |
| Dissipation factor | 0.05 | N/A | At 1 kHz |
| Volume resistivity | 1 × 10¹⁴ | ohm·cm | ASTM D257 |
