Henkel LOCTITE-438 (20GM-BOTTLE)

Additional Product Information

Overview

LOCTITE 438 is a high-performance, rubber-toughened cyanoacrylate adhesive designed for fast, reliable bonding in aviation and MRO environments. Teams rely on it for its rapid curing, flexibility, and ability to bond metals, plastics, rubbers, and porous substrates. Its versatility and durability make it a trusted solution for repair, maintenance, and operational readiness (AOG) tasks.

Key Technical Specs for LOCTITE 438

• Type: Rubber-toughened cyanoacrylate adhesive
• Size/Volume: Single-component, low-viscosity liquid
• Color: Black (uncured)
• Viscosity/Consistency: 100 250 mPa s (cP) at 25 C, shear rate 1,000 s?
• Cure/Working Time: Fixture times vary by substrate (5 120 seconds typical at 22 C / 50% RH)
• Tensile/Peel Strength: Lap shear strength up to 19 N/mm (2,800 psi) on steel; tensile strength up to 34 N/mm (4,900 psi); 180 peel strength 4 N/mm (20 lb/in)
• Shore Hardness: N/A (adhesive properties depend on substrate)
• Service Temperature: Functional from 0 to 100 C (32 212 F), maintains strength under heat and humidity
• Typical Uses: Bonding metals, plastics, elastomers, wood, paper, leather, fabrics; shock-resistant joints; MRO repairs
• Shelf Life: Store 2 8 C (36 46 F), unopened in dry conditions; avoid contamination

Approvals & Specifications

• Henkel internal quality standards
• Compliant with ISO 4587 (shear strength), ISO 13445 (block shear), ISO 6922 (tensile)
• IEC 60093 (electrical resistivity), IEC 60243-1 (dielectric breakdown)
• ISO 11359-2 (thermal expansion and glass transition)

Typical Aircraft MRO / AOG Applications

• Metal-to-metal and metal-to-plastic component bonding
• Rubber gasket and seal repairs
• Adhesion of interior panels, leather, and fabric components
• Rapid repairs on structural and non-structural parts
• Emergency maintenance requiring fast-curing adhesive

Compatibility & Safety Notes

• Compatible substrates: metals, plastics, elastomers, wood, paper, leather, fabrics
• Not recommended for pure oxygen or strong oxidizers
• PPE: gloves and eye protection advised during handling
• Keep surfaces clean and free from grease for best performance
• Excess adhesive removable with nitromethane or acetone

Packaging & Procurement

• Available in single-component low-viscosity bottles
• Store in unopened containers at 2 8 C (36 46 F)
• Easy-to-use application, suitable for precision dispensing
• Market packs available for both small-scale MRO and bulk industrial use

Why LOCTITE 438 is Chosen for AOG / MRO

• Fast curing reduces aircraft downtime
• Versatile bonding across multiple substrates
• Shock-resistant, flexible adhesive ensures durable repairs
• Portable and easy to handle in field or hangar environments

Practical Suggestions for Your Team (AOG Mindset)

• Stock sufficient quantities for emergency and routine repairs
• Use thin bond gaps (0.05 mm) to optimize cure speed
• Train maintenance personnel on proper substrate preparation and adhesive application
• Store containers properly to maintain product integrity

Manufacture / Aviation Spec Codes

• Manufacturer: Henkel Corporation
• Product ID: LOCTITE 438
• MIL/OEM/Export codes: Refer to Henkel quality documentation for batch-specific details

Alternative Names & Descriptions

• Loctite 438 Adhesive
• Henkel LOCTITE 438
• Rubber-toughened cyanoacrylate LOCTITE 438
• LOCTITE 438 Black Liquid Adhesive
• LOCTITE 438 Ethyl Cyanoacrylate