Brands: Scotch-Weld™
Package Sizes:
Shelf Life: 24 months
3M™ Scotch-Weld™ Epoxy Adhesive DP420 Black is a high-performance, two-part epoxy adhesive offering excellent shear and peel adhesion, and very high levels of durability. It is designed for bonding a variety of substrates, including metals, ceramics, wood, and many plastics. This adhesive provides a 20-minute work life, allowing ample time for positioning and adjustment. It reaches handling strength in approximately two hours and is fully cured in 24 hours at 72°F (22°C). DP420 Black maintains bond strength at high and low temperatures and can withstand paint bake operations up to 400°F (204°C) for 60 minutes.
| Attribute | Base Component | Accelerator Component |
|---|---|---|
| Color | Black | Amber |
| Viscosity | 15,000 – 50,000 cP¹ | 6,000 – 14,000 cP² |
| Density | 1.11 – 1.16 g/cm³ (9.3 – 9.7 lb/gal) | 1.08 – 1.13 g/cm³ (9.0 – 9.4 lb/gal) |
| Mix Ratio by Volume (B:A) | 2:1 | |
| Mix Ratio by Weight (B:A) | 2:0.97 |
¹ Viscosity measured using Brookfield RTV, spindle #7, 20 RPM.
² Viscosity measured using Brookfield RVF, spindle #6, 20 RPM.
| Attribute | Value |
|---|---|
| Color (Mixed) | Black |
| Open Time | 20 minutes¹ |
| Time to Handling Strength | 2 hours at 23°C (73°F) |
| Full Cure Time | 24 hours at 23°C (73°F) |
¹ Maximum time allowed after applying adhesive to a substrate before bond must be closed and fixed.
| Attribute | Test Method | Value |
|---|---|---|
| Shore D Hardness | ASTM D2240 | 80 |
Overlap Shear Strength
| Substrate | Surface Preparation | Test Temperature | Dwell Time | Strength¹ |
|---|---|---|---|---|
| Aluminum | Etched | 23°C (73°F) | 24 hours | 4,387 psi |
| Cold Rolled Steel | Acetone/Abrade/Acetone | 23°C (73°F) | 7 days | 2,850 psi |
| FRP (Epoxy) | Acetone/Abrade/Acetone | 23°C (73°F) | 7 days | 5,706 psi |
| FRP (Polyester) | Acetone/Abrade/Acetone | 23°C (73°F) | 7 days | 1,062 psi |
| ABS | IPA Wipe | 23°C (73°F) | 7 days | 432 psi |
| Polycarbonate (PC) | IPA Wipe | 23°C (73°F) | 7 days | 613 psi |
| PVC | IPA Wipe/Abrade/IPA Wipe | 23°C (73°F) | 7 days | 185 psi |
¹ Tested per ASTM D1002, ISO 4587.
Bell Peel Strength
| Substrate | Surface Preparation | Test Temperature | Dwell Time | Strength¹ |
|---|---|---|---|---|
| Aluminum | Etched | 23°C (73°F) | 24 hours | 71 lb/in width |
¹ Tested per ASTM D3167.
Stronger Bonding. Cleaner Process. Reliable Performance. If you are looking for an adhesive that combines high adhesion strength, flexibility, and electronic safety, 3320-80 is the
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As the year draws to a close and the Christmas season arrives, Avantek Viet Nam would like to extend our warmest Christmas greetings to all our valued customers, partners, and friends.
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