Brands: 3M™ Scotch-Weld™
Package Sizes: 950 mL Kit
Shelf Life: 24 months
3M™ Scotch-Weld™ Epoxy Adhesive 1838 B/A Green is a two-part, controlled-flow structural adhesive that cures at room temperature and provides high shear strength with excellent environmental resistance. It is suitable for bonding many metals, wood, and some plastics and is recognized for meeting UL 94 HB standards.
| Attribute | Value |
|---|---|
| Mix Ratio by Volume (B:A) | 4:5 |
| Mix Ratio by Weight (B:A) | 1:1 |
| Base Color | White |
| Accelerator Color | Green |
| Base Resin | Modified Epoxy |
| Accelerator Resin | Polyamide |
| Base Net Weight | 11.0 – 11.6 lb/gal |
| Accelerator Net Weight | 8.9 – 9.3 lb/gal |
| Base Viscosity (27°C / 80°F) | 70,000 – 600,000 cP |
| Accelerator Viscosity (27°C / 80°F) | 300,000 – 1,000,000 cP |
| Attribute | Temperature | Value |
|---|---|---|
| Open Time | 60 min | – |
| Work Life (100g mixed) | 23°C (73°F) | 60 min |
| Time to Full Cure | 23°C (73°F) | 8 h |
| Attribute | Test Method | Temperature | Value |
|---|---|---|---|
| Cured Color | – | – | Green |
| Modulus | – | – | 344,000 lb/in² |
| Shore D Hardness | ASTM D2240 | – | 82 |
| Test | Substrate | Test Method | Temperature | Value |
|---|---|---|---|---|
| T-Peel Adhesion | Aluminum | ASTM D1876 | -55°C (-67°F) | 2 lb/in width |
| T-Peel Adhesion | Aluminum | ASTM D1876 | 23°C (73°F) | 4 lb/in width |
| T-Peel Adhesion | Aluminum | ASTM D1876 | 82°C (180°F) | 4 lb/in width |
| Elongation at Break | – | – | – | 2 – 3% |
| Tensile Strength at Break | – | – | – | 4,290 lb/in² |
| Attribute | Test Method | Condition | Value |
|---|---|---|---|
| Glass Transition Temperature (Tg) | – | Mid-Point | 55°C (131°F) |
| Thermal Conductivity | – | – | 0.169 (btu-ft)/(h-ft²-°F) |
| Dielectric Constant | ASTM D150 | 1 KHz | 6.06 |
| Dissipation Factor | ASTM D150 | 1 KHz | 0.012 |
| Volume Resistivity | ASTM D257 | – | 1.5 x 10¹⁵ Ω-cm |
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