Henkel Loctite EA 11C Black Structural Epoxy Adhesive – 4 oz Kit
Loctite EA 11C is a black, two-component structural epoxy adhesive from Henkel’s EA (Epoxy Adhesive) product line, designed for high-strength structural bonding of metals, composites, plastics, and ceramics in aerospace, electronics, and industrial applications. Its black formulation provides an aesthetically appropriate bond line on dark-colored substrates including anodized aluminum, black plastic housings, and carbon fiber composites where a colored adhesive joint would be visually intrusive.
The 4 oz kit provides a practical quantity for MRO repair operations, small production runs, and maintenance tasks where a larger package would result in material waste due to pot life limitations after mixing. The kit contains pre-measured quantities of base and hardener to ensure correct mixing ratio for specification-quality bonds on every use.
EA 11C delivers the strong lap shear and tensile adhesion strength expected of Loctite structural epoxies, combined with good chemical resistance to aerospace fluids, hydraulic oils, and cleaning agents. Its room-temperature cure makes it suitable for field maintenance and repair operations where elevated-temperature cure equipment is not available.
| Attribute | Detail |
|---|---|
| Manufacturer Part Number (MPN) | 13373435 |
| Brand | Henkel / Loctite |
| Product Name | LOCTITE EA 11C |
| Color | Black |
| Product Type | Two-Component Structural Epoxy Adhesive |
| Package Size | 4 oz Kit |
| Substrate Compatibility | Metal, Composite, Plastic, Ceramic |
| Application Method | Manual Mix and Apply |
| Cure Type | Two-Component Epoxy — Room Temperature Cure |
| Industry Use | Aerospace, Industrial, Electronics, MRO |
Technical Information
Loctite EA 11C uses a bisphenol epoxy resin cured with an amine or amide hardener to form a fully crosslinked thermoset epoxy network with high mechanical strength and chemical resistance. The black pigment system is formulated with stable colorants that maintain their color and opacity throughout the adhesive’s service life without affecting the mechanical or chemical properties of the cured epoxy matrix.
Surface preparation significantly affects the bond strength achieved with EA 11C. Metal surfaces should be cleaned with solvent and lightly abraded or sandblasted to remove oxide layers and create mechanical interlocking sites for the adhesive. Composite surfaces require light abrasion and solvent wipe. Proper surface preparation maximizes the adhesive-substrate contact area and ensures the adhesive forms a strong physical and chemical bond with the substrate surface.
The 4 oz kit format requires manual measurement and mixing of base and hardener in the specified ratio. Careful ratio adherence is essential — deviation from the specified ratio results in incomplete crosslinking, producing under-cured epoxy with significantly reduced mechanical properties and chemical resistance. Use calibrated mixing cups or a precision scale to ensure correct proportioning before mixing.
Why Choose Loctite EA 11C?
- ✅ Black Color — Invisible bond line on dark substrates and carbon fiber
- ✅ Structural Strength — High lap shear and tensile adhesion on metals and composites
- ✅ 4 oz Kit — Pre-measured, right-sized for MRO repairs
- ✅ Room Temperature Cure — No heat equipment required
- ✅ Loctite Quality — Henkel’s globally trusted structural adhesive brand
Applications
EA 11C is used for carbon fiber composite bonding, black plastic housing assembly, electronics component attachment, and structural repair in aerospace and industrial applications requiring a black, high-strength epoxy adhesive.
Frequently Asked Questions
Q: What is Loctite EA 11C used for?
A: EA 11C is a black two-component structural epoxy for bonding metals, composites, plastics, and ceramics where a black adhesive bond line is required for aesthetic compatibility with dark substrates.
Q: What is the MPN for Loctite EA 11C 4oz kit?
A: MPN is 13373435.
Q: What substrates does EA 11C bond?
A: EA 11C bonds metal, composite, plastic, and ceramic substrates. Clean and lightly abrade metal and composite surfaces before bonding for maximum strength.
Q: Does EA 11C require mixing?
A: Yes. EA 11C is a two-component epoxy requiring accurate ratio mixing of base and hardener before application. Follow the Henkel TDS for the exact mixing ratio and procedure.
Q: What is the cure time for Loctite EA 11C?
A: EA 11C cures at room temperature. Refer to the Henkel EA 11C TDS for handling strength and full cure time at various temperatures.
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