Loctite 380 Instant Adhesive Black

LOCTITE® 380 Instant Adhesive is a low-viscosity, rubber-toughened black instant adhesive engineered for maximum efficacy in high-precision part assembly. This industrial-grade adhesive permanently bonds close-fitting components, preventing costly joint failure and parts detachment caused by severe physical shock and high impact forces. Whether you are securing metal brackets or rubber gaskets, this premium cyanoacrylate provides a robust, leak-proof seal on all common industrial substrates—including difficult-to-bond metals, rubbers, and selected plastics.

Why Choose LOCTITE® 380 Rubber-Toughened Flexibility?

• Enhanced Impact & Shock Resistance: Formulated with a specialized rubber compound that absorbs mechanical vibrations and prevents adhesive cracking under intense stress.
• Superb Peel and Shear Strengths: Delivers outstanding structural hold over long cycles, dramatically improving performance on joints subject to bending or peeling forces.
• Excellent Low Viscosity Flow: Maintains a thin, liquid consistency (300 mPa·s) perfect for tight-tolerance, close-fitting assemblies where minimal bond gap is required.
• Ideal Heavy-Duty Use Cases: Optimized for demanding metal-to-metal bonding, rubber components, automotive trims, and industrial manufacturing repairs.
• Rapid Room-Temperature Cure: Requires no complex heat cycles or mixing equipment, initiating fixture quickly upon exposure to atmospheric humidity.

Technical Specifications

• Product Type: Rubber-Toughened Ethyl Cyanoacrylate Instant Adhesive
• Strength: High Impact, Shear, and Peel Strength (3,750 psi Grit Blasted Steel to Glass)
• Color: Black
• Container Size: 28.3g
• Temperature Range: -65°F to +225°F (-54°C to +107°C)

Simple Application Instructions

1. Clean: For optimal results, clean all internal and external mating surfaces thoroughly to ensure they are entirely dry and free from residual grease, dust, or processing oils.
2. Apply: Apply several drops of the liquid instant adhesive sparingly to just one of the bond surfaces. This formula performs best at ultra-thin bond line gaps around 0.05 mm.
3. Assemble: Assemble and align the parts immediately, then press them firmly together. The formula will begin curing once it is pressed thin and exposed to atmospheric moisture trapped between the close-fitting surfaces. Hold the assembly securely until it reaches initial fixture strength. Allow a full 24 hours to achieve maximum chemical and solvent resistance.

Frequently Asked Questions (FAQ)

What is LOCTITE® 380 used for?

LOCTITE® 380 is a rubber-toughened instant adhesive designed for close-fitting industrial assemblies. It is specifically formulated to prevent metal, rubber, and plastic parts from failing or pulling apart due to heavy impact, severe vibrations, or sudden mechanical shocks.

Can LOCTITE® 380 be disassembled?

Yes, though it creates a highly resilient bond. Any excess un-cured or freshly cured surface adhesive can be dissolved and stripped away using specialized industrial cleanup solvents, nitromethane, or standard Acetone. For bonded internal joints, applying localized high temperatures (exceeding 120°C) alongside mechanical leverage will help weaken the polymer matrix for disassembly.

Does LOCTITE® 380 work on plastics and rubbers?

Yes. LOCTITE® 380 offers robust, highly flexible performance across a wide array of industrial materials. It is exceptionally effective at anchoring rubbers and metals, and provides excellent adhesion on selected non-porous structural plastics.

Is LOCTITE® 380 safe for oxygen-rich environments?

No. LOCTITE® 380 is an organic compound and is not recommended or approved for use in pure oxygen or oxygen-rich systems. Additionally, it should never be selected as a sealant or adhesive barrier for handling pipelines carrying chlorine or other highly aggressive oxidizing chemicals.