3M EC-1838
Harmonization Code : 3214.10.00 | Putty and other mastics | Resin cements, caulking compounds and other mastics
Main features
- Controlled Flow Structural Placement
- One Hour Assembly Work Life
- Durable Environmental Bonding
Product Description
3M Scotch-Weld Epoxy Adhesive EC-1838 B/A is a green, controlled-flow structural epoxy for prepared metals, wood, and selected plastics. Mix Part B and Part A at 4:5 by volume or 1:1 by weight; the paste provides a 60 minute work life at 23 deg C and limits migration after placement. Handling strength develops in 6 to 10 hours at room temperature or 15 to 20 minutes at 65 deg C. The cured adhesive reaches Shore D 82 hardness, 2% to 3% elongation, and a 55 deg C glass transition temperature.
Key features
- Controlled Flow Placement: The paste formulation limits migration after the adhesive is applied.
- One Hour Work Life: A 60 minute processing window supports coating, alignment, and fixturing.
- Durable Structural Epoxy: High shear strength and environmental resistance support prepared industrial joints.
Applications
Structural bonding of prepared metals, wood, selected plastics, and assemblies requiring controlled adhesive flow.
Technical Specifications
No specifications available.
Additional Information
As-supplied / before-processing properties
| Property | Value | Unit | Method / condition |
|---|---|---|---|
| Mix ratio by volume | 4:5 | B:A | Two-part system |
| Mix ratio by weight | 1:1 | B:A | Two-part system |
| Base color | White | - | Before mixing |
| Accelerator color | Green | - | Before mixing |
| Base viscosity | 70000 to 600000 | cP | At 27 deg C |
| Accelerator viscosity | 300000 to 1000000 | cP | At 27 deg C |
| Work life | 60 | min | 100 g mixed at 23 deg C |
After-processing / final-state properties
| Property | Value | Unit | Method / condition |
|---|---|---|---|
| Color | Green | - | Cured |
| Hardness | 82 | Shore D | ASTM D2240 at 23 deg C |
| Elongation at break | 2 to 3 | % | At 23 deg C |
| Tensile strength at break | 4290 | psi | At 23 deg C |
| Glass transition temperature | 55 | deg C | DSC midpoint |
| Volume resistivity | 1.5 x 10^15 | ohm-cm | ASTM D257 at 23 deg C |
