Henkel LOCTITE-AA-3491 (25ML-SYRINGE)

Additional Product Information

Overview

LOCTITE AA 3491 is a high-performance, UV-curable acrylic adhesive designed for rapid bonding, potting, and sealing applications. Widely used in aviation and MRO operations, this product enables teams to achieve fast, reliable assembly of glass, metal, and select plastic components. Maintenance crews rely on its consistent cure, durability, and environmental resistance to minimize downtime and maintain operational readiness.

Key Technical Specs for LOCTITE AA 3491

• Type: Modified acrylic, one-component adhesive
• Appearance: Transparent liquid
• Viscosity / Consistency: Medium (750 1,500 mPa s / cP at 25 C)
• Cure / Working Time: UV light (365 nm); fixture in seconds depending on intensity and bondline thickness
• Tensile Strength: At yield 44.1 N/mm (6,400 psi), at break 25.5 N/mm (3,700 psi)
• Peel Strength: Glass 6.8 N/mm (39 lb/in)
• Shore Hardness: D 75
• Service Temperature: Heat resistance up to 149 C (300 F) with minimal loss in strength
• Typical Uses: Bonding glass to glass, glass to metal, decorative glass, automotive lighting components, potting and sealing applications
• Shelf Life: Store unopened at 8 21 C (46 70 F); avoid exposure to light and temperature extremes

Approvals & Specifications

• Compliance with ISO 4587, ISO 13445, ISO 527-3, ASTM D 3658
• Meets general industrial and MRO bonding standards for glass and metals

Typical Aircraft MRO / AOG Applications

• Bonding decorative or molded glass panels in cockpit and cabin assemblies
• Sealing and potting transparent components in avionics housings
• Repair and assembly of aircraft lighting components

Compatibility & Safety Notes

• Compatible with glass, metals (aluminum, steel, stainless steel), and certain plastics (PVC, ABS, polycarbonate, acrylic)
• Not recommended for pure oxygen or strong oxidizers
• Wear appropriate PPE including gloves and eye protection
• Avoid prolonged exposure to UV light during storage and handling

Packaging & Procurement

• Available in liquid formulations suitable for applicator dispensing
• Store in unopened containers at 8 21 C (46 70 F)
• Black feedline dispensers recommended to prevent premature curing
• Easy handling for fast production or field repairs

Why LOCTITE AA 3491 is Chosen for AOG / MRO

• Rapid UV cure accelerates maintenance and repair timelines
• Strong, impact-resistant bonds reduce repeat repairs
• Versatile adhesion across multiple substrates simplifies inventory
• Reliable performance under heat, humidity, and water exposure

Practical Suggestions for Your Team (AOG Mindset)

• Stock black feedline dispensers for controlled application
• Store away from UV light and extreme temperatures
• Train technicians on proper surface preparation and curing procedures
• Use small batches for field repairs to prevent contamination

Manufacture / Aviation Spec Codes

• Manufacturer: Henkel
• Product ID: LOCTITE AA 3491
• Tested to ISO 4587, ISO 13445, ISO 527-3, ASTM D 3658
• Compliant with general industrial MRO bonding requirements

Alternative Names & Descriptions

• Henkel AA 3491 Adhesive
• LOCTITE AA 3491 Acrylic Adhesive
• UV-curable LOCTITE 3491
• Modified Acrylic AA 3491
• LOCTITE Glass Bonding Adhesive 3491