3M EC-3901
Harmonization Code : 3214.10.00 | Putty and other mastics | Resin cements, caulking compounds and other mastics

Main features
- Metal And Glass Surface Priming
- Improved Metal Corrosion Protection
- Clean Surface Oxidation Protection
Product Description
3M Scotch-Weld Structural Adhesive Primer EC-3901 is a red, one-component metal and glass primer for use before compatible 3M Scotch-Weld film and liquid structural adhesives. Its low-viscosity liquid wets prepared surfaces and is designed to improve adhesion while adding corrosion protection and resistance to environmental exposure on metal. The primer also protects cleaned surfaces from oxidation while bonding operations are scheduled. Use it in prepared metal and glass bonding processes where a dedicated primer layer is needed before the structural adhesive is applied.
Key features
- Metal And Glass Adhesion Primer: The one-component liquid prepares compatible metal and glass for structural bonding.
- Improved Metal Corrosion Protection: The primer adds protection against corrosion and environmental exposure on metal.
- Cleaned Surface Protection: Primed surfaces remain protected from oxidation until bonding can be completed.
Applications
Prepared metal and glass surfaces before compatible 3M Scotch-Weld film and liquid structural adhesive application.
TDS, SDS & Technical Documents
Technical Specifications
General Properties
Physical Properties
Thermal Properties
Additional Information
As-supplied / before-processing properties
| Property | Value | Unit | Method / condition |
|---|---|---|---|
| Product type | One-component primer | - | As supplied |
| Color | Red | - | As supplied |
| Viscosity | Low | - | Liquid primer for wetting prepared surfaces |





















