Loctite 408 Instant Adhesive 20g

Loctite 408 Instant Adhesive 20g

Loctite 408 Instant Adhesive 20g is a low odor, low bloom alkoxyethyl-based instant adhesive engineered for maximum efficacy in high-precision bonding. This industrial-grade adhesive permanently bonds close-fitting surfaces, preventing costly component failures caused by operational stress or aesthetic vapor marring. Whether you are securing delicate electronics or heavy-duty components, this premium cyanoacrylate provides a robust, seamless seal on all metals, plastics, and elastomers—including low-energy substrates and porous materials.

Why Choose Loctite 408?

• Low Bloom & Low Odor: Perfect for applications where vapor control is difficult, ensuring an ultra-clear finish without cosmetic blemishes.
• Exceptional Material Compatibility: Works seamlessly across metals, plastics, rubber, and elastomers.
• Porous Surface Optimization: Particularly well-suited for difficult, porous, or acidic substrates such as wood, paper, leather, and fabric.
• Capillary Action Performance: Low viscosity formulation easily wicks into tight, pre-assembled joints for quick and easy application.
• H&S Labelling-Free: Formulated without solvent carriers or hazardous material labels, making it a safer choice for the workplace.

Technical Specifications

• Product Type: Alkoxyethyl cyanoacrylate (Instant Adhesive)
• Strength: High (2600 psi Shear Strength on Grit Blasted Steel)
• Color: Ultra Clear
• Container Size: 20g
• Viscosity: 5 mPa.s (cP) Brookfield

Simple Application Instructions

1. Clean: For optimal results, clean all internal and external surfaces with a Loctite® cleaning solvent and let dry completely.
2. Apply: Apply several drops of the liquid adhesive to one of the bond surfaces. Do not use a tissue or brush to spread the adhesive. (For low-energy plastics, Loctite® Primer 770 or 7239 may be applied and allowed to dry beforehand).
3. Assemble: Assemble and accurately locate the parts within a few seconds. The formula will begin curing immediately once confined between close-fitting surfaces via atmospheric moisture. Hold fixed or clamped until fixtured.

Frequently Asked Questions (FAQ)

What is Loctite 408 used for?

Loctite 408 is a low odor, low bloom instant adhesive designed for rapid bonding of close-fitting components. It is specifically formulated to prevent parts from shifting or loosening while maintaining a pristine, clear appearance free from white vapor residue (blooming).

Can Loctite 408 be disassembled?

No, under normal operating conditions, this forms a permanent rigid bond. Disassembly typically requires specific chemical de-bonding agents (like nitromethane or acetone) or mechanical force depending on the substrate's durability.

Does Loctite 408 work on plastics and polyolefins?

Yes. Loctite 408 offers robust performance across standard plastics. For difficult, low-energy polyolefin plastics, it achieves maximum strength when used in combination with Primer LOCTITE® SF 770 or LOCTITE® SF 7239.

Is Loctite 408 safe for sensitive visual environments?

Yes. Because it features a low-vapor, low-bloom formulation, it is highly recommended for assemblies where appearance is critical and white cosmetic clouding around the bond line must be avoided.