DOWSIL EA2900
Harmonization Code : 2901.10.00.00 | Acyclic hydrocarbons; Saturated
Main features
- Fast Assembly-Strength Development
- 400% Cured Elongation
- 17.1 kV/mm Dielectric Strength
Product Description
DOWSIL EA-2900 Sealant White is a one-part, white, neutral alkoxy-cure RTV silicone adhesive for bonding and sealing PCB assemblies and optical parts in LED lamps and luminaires. The material extrudes at 190 g/min and reaches a typical tack-free state in 20 minutes at 23 deg C and 50% relative humidity. Aluminum lap-shear assembly strength increases from 4 kPa at 10 minutes to 100 kPa after one day, while full-property data apply after seven days under the same temperature and humidity. The cured elastomer provides 400% elongation, 17.1 kV/mm dielectric strength and UL 94 V-1 classification at 6 mm.
Key features
- Fast assembly-strength development: Aluminum lap-shear strength is reported from 10 minutes through one day.
- 400% cured elongation: The seven-day cured elastomer retains high extension capability.
- Electrical insulation data: Typical dielectric strength is 17.1 kV/mm with 1.02E+14 ohm cm volume resistivity.
Applications
Bonding and sealing PCB system components and devices, and assembling optical parts in LED lamps and luminaires.
TDS, SDS & Technical Documents
Technical Specifications
General Properties
Physical Properties
Mechanical Properties
Electrical Properties
Additional Information
As-supplied / before-processing properties
Typical as-supplied and early assembly values. Assembly strength is not full cure. Values are not specifications.
| Property | Value | Unit | Method / condition |
|---|---|---|---|
| Component count | One | As supplied | |
| Color | White | As supplied | |
| Extrusion rate | 190 | g/min | As supplied |
| Specific gravity | 1.52 | g/ml | As supplied |
| Tack-free time | 20 | minutes | 23 deg C, 50% relative humidity |
| Assembly strength after 10 minutes | 4 | kPa | Aluminum lap shear |
| Assembly strength after 60 minutes | 10 | kPa | Aluminum lap shear |
| Assembly strength after 1 day | 100 | kPa | Aluminum lap shear |
| Shelf life at 25 deg C | 12 | months | Unopened storage |
After-processing / final-state properties
Typical properties after seven days at 23 deg C and 50% relative humidity unless noted. Values are not specifications.
| Property | Value | Unit | Method / condition |
|---|---|---|---|
| Durometer hardness | 50 | Shore A | Seven-day cure |
| Modulus at 100% elongation | 1.2 | MPa | Seven-day cure |
| Tensile strength at break | 2.1 | MPa | Seven-day cure |
| Elongation at break | 400 | % | Seven-day cure |
| Unprimed lap shear to aluminum | 1.5 | MPa | Substrate-specific |
| Unprimed lap shear to glass | 1.6 | MPa | Substrate-specific |
| Unprimed lap shear to polycarbonate | 1.5 | MPa | Substrate-specific |
| Unprimed lap shear to PMMA | 1.5 | MPa | Substrate-specific |
| Dielectric strength | 17.1 | kV/mm | Cured material |
| Volume resistivity | 1.02E+14 | ohm cm | Cured material |
| UL flammability classification | 94 V-1 | At 6 mm |
