LOCTITE® AA 349

LOCTITE® AA 349 (50ml) is a transparent, acrylic-based medium-viscosity light-cure adhesive engineered for maximum efficacy in industrial glass and metal bonding. This industrial-grade adhesive permanently bonds and seals components, preventing costly structural failures and joint loosening caused by physical stress or environmental exposure. Whether you are securing precision optical instruments or glass furniture components, this premium UV-cure adhesive provides a robust, leak-proof seal on all compatible materials—including difficult dissimilar substrates like glass-to-metal interfaces.

Why Choose LOCTITE® AA 349 High Optical Clarity?

• Rapid High-Speed Cure: Achieves rapid structural fixture in 1 to 8 seconds upon targeted exposure to UV radiation.
• Exceptional Material Versatility: Provides an outstanding, crystal-clear bond line primarily between glass-to-glass and glass-to-metal materials.
• Excellent Fluid Resistance: Demonstrates robust chemical stability with 100% strength retention when exposed to gasoline, alcohols, and common solvents.
• Ideal Heavy-Duty Use Cases: Perfect for manufacturing precision optical instruments, industrial glass devices, or specialized electrical potting and tacking applications.
• Resilient Thermal Profile: Maintains solid structural performance in rugged working environments, with superior heat-aging stability up to 120°C.

Technical Specifications

• Product Type: Light-Cure Acrylic Adhesive (Modified Methacrylate Ester)
• Strength: High Tensile Strength (1,600 psi steel pin to glass)
• Color: Transparent, Colorless to Pale Yellow
• Container Size: 50ml
• Certifications: Meets ISO 6922 testing benchmarks; optimized electrical properties complying with industry-standard volume resistivity (5x10¹⁵ Ω·cm)

Simple Application Instructions

1. Clean: For optimal results, clean all internal and external bonding surfaces with a high-quality organic cleaning solvent and let dry completely to remove trace greases or oils.
2. Apply: Apply several drops of the liquid light-cure adhesive to the target joint location area. Since the product is light-sensitive, keep exposure to natural daylight or ambient lighting minimized during dispensing.
3. Assemble: Assemble and position the parts as required. The formula will begin curing once it is exposed to UV radiation (ideally at 365nm wavelength with a minimum intensity of 40 mW/cm² at the bond line). Maintain light exposure until the parts reach fixture status.

Frequently Asked Questions (FAQ)

What is LOCTITE® AA 349 used for?

LOCTITE® AA 349 is a transparent light-cure acrylic adhesive designed for high-strength bonding and sealing. It is specifically formulated to prevent glass-to-glass and glass-to-metal assemblies from structural shifting or failing due to mechanical shock, temperature cycling, or environmental stress.

Can LOCTITE® AA 349 be disassembled?

No, standard hand tools are typically insufficient due to the high-strength nature of the cured methacrylate matrix. Disassembly requires localized application of extreme thermal stress (typically over 150°C to soften the polymer framework) combined with mechanical leverage, or prolonged immersion in aggressive industrial chemical solvents.

Does LOCTITE® AA 349 work on plastics?

Yes, though it is primarily optimized for glass and metals, it can achieve adhesion on selected plastics such as PVC, ABS, and Polycarbonate. However, plastic material grades should be evaluated prior to regular use to check for risk of chemical stress cracking when exposed to the liquid un-cured monomer.

Is LOCTITE® AA 349 safe for specialized environments?

LOCTITE® AA 349 is engineered with high dielectric strength (90 kV/mm), making it exceptionally safe and effective for sensitive electronics, potting, and tacking applications. However, this chemical formulation is not recommended for use in pure oxygen, oxygen-rich setups, or as a sealant for chlorine and other strong oxidizing agents.