• Item Name: 1521
• Manufacturer: H.B. Fuller
• Technologies: Two-component silicone adhesive
• Color: Black
• Cure Type: Room temperature cure
• Package Size: Contact Techniq VN for details
• Shelf Life: 6 months
1521 (Black) is a two-component silicone-based adhesive designed for fast room-temperature curing, providing excellent sealing and bonding. It is typically used for potting electronic components, especially in junction boxes on PV modules. The adhesive features easy handling due to a 6:1 mixing ratio, excellent adhesion, electrical performance, and resistance to hot and damp conditions.
Key Features & Benefits:
Fast cure at room temperature with deep section cure.
Easy handling due to 6:1 mixing ratio.
Excellent adhesion to various substrates.
Suitable for automated dispensing.
Excellent electrical performance.
Excellent resistance to hot damp conditions.
Type of Product: Adhesive
Components: Two-component
Curing: Room temperature
Appearance/Color: Black
Consistency: Viscous Liquid
Shelf Life: 6 months from manufacture
Potting of electronic components.
Junction boxes on PV modules.
Automated dispensing applications requiring high electrical insulation and sealing performance.
| Property | Value | Test Method / Condition |
|---|---|---|
| Viscosity (Resin) | 13,000 mPa·s | GB/T 2794 |
| Viscosity (Activator) | 25 mPa·s | GB/T 2794 |
| Flash Point | >93℃ | GB/T 5208 |
| Property | Value | Test Method / Condition |
|---|---|---|
| Viscosity (Mixed) | 3,000 mPa·s | GB/T 2794 |
| Mixed Density | 1.40 g/cm³ | GB/T 13354 |
| Working Time | 8 minutes | GB/T 5208 |
| Gel Time | 60 minutes | GB/T 5208 |
Cured Mechanical Properties
| Property | Value | Test Method |
|---|---|---|
| Hardness | 40 Shore A | GB/T 531 |
| Tensile Strength | 1.2 MPa | GB/T 528 |
| Elongation at Break | 110% | GB/T 528 |
Thermal & Electrical Properties
| Property | Value | Test Method |
|---|---|---|
| Thermal Service Range | –50 to 150℃ | – |
| Thermal Conductivity | 0.30 W/m·K | DIN EN 821 |
| Volume Resistivity | 1.0×10¹⁵ Ω·cm | GB/T 1692 |
| Breakdown Strength | 23 kV/mm | GB/T 1695 |
Damp-Heat Aging (85℃, 85% RH, 1000h)
| Property | Value | Test Method |
|---|---|---|
| Volume Resistivity | 1.0×10¹⁵ Ω·cm | GB/T 1692 |
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