Loctite AA 363 Light Cure Adhesive 1l

LOCTITE® AA 363 Light Cure Adhesive (1L) is a low-viscosity, clear to light-straw liquid acrylic urethane methacrylate adhesive engineered for maximum efficacy in high-speed industrial curing. This industrial-grade adhesive permanently encapsulates electronic components, preventing costly structural degradation, moisture ingress, and short circuits caused by environmental exposure and physical vibration. Whether you are securing sensitive circuit tracks or delicate surface-mount devices, this premium light-cure adhesive provides a robust, leak-proof seal on all compatible electronic substrates—including challenging glass-to-metal and thermoplastic interfaces.

Why Choose LOCTITE® AA 363 High-Speed Encapsulation?

• Rapid Ultra-Fast Cure Times: Achieves firm structural fixture in as little as 5 seconds when exposed to targeted UV radiation, optimizing high-speed assembly lines.
• Optimized Low-Viscosity Flow: Engineered with a low viscosity of 250 mPa·s (cP) to easily flow into micro-gaps, ensuring flawless potting across intricate components.
• Complete Tack-Free Surface: Achieves a completely dry, tack-free surface profile within 25 seconds when subjected to dual-wavelength UV curing (365nm + 250nm) in open air.
• Ideal for Electronic Assemblies: Perfect for heavy-duty electronic manufacturing, shallow potting applications, and thin-film encapsulation of delicate circuit boards.
• Broad Operating Temperature Spectrum: Maintains outstanding material stability and insulation properties across a wide thermal footprint of -65°F to +356°F (-54°C to +180°C).

Technical Specifications

• Product Type: Light-Cure Liquid Acrylic Urethane Methacrylate Adhesive
• Strength: High Tensile Shear Strength (1,740 psi grit-blasted steel to glass)
• Color: Clear, Light Straw
• Container Size: 1L (1 Litre)
• Viscosity: 250 mPa·s (cP) Brookfield

Simple Application Instructions

1. Clean: For optimal results, clean all internal and external surfaces with a dedicated industrial cleaning solvent to remove all trace grease, dust, or processing oils, and let dry completely.
2. Apply: Dispense the liquid light-cure adhesive directly to the target shallow potting or thin-film encapsulation location area. Because the formula is highly light-sensitive, it must be dispensed via applicators equipped with black feedlines to minimize exposure to daylight and artificial workshop lighting.
3. Assemble: Position the components as required. The formula will begin curing immediately upon exposure to UV radiation at 365nm (recommended intensity of 5 to 100 mW/cm² depending on the depth of cure required). Allow the components to cool completely before subjecting the completed assembly to any mechanical service loads.

Frequently Asked Questions (FAQ)

What is LOCTITE® AA 363 used for?

LOCTITE® AA 363 is a low-viscosity light-cure adhesive designed for thin-film encapsulation and shallow potting of electronic assemblies. It is specifically formulated to prevent sensitive electronic parts and circuitry from failing or shorting out due to environmental moisture, thermal shock, or industrial vibrations.

Can LOCTITE® AA 363 be disassembled?

No, standard manual hand tools cannot remove or strip this cured methacrylate matrix without risking structural damage to the underlying electronics. Any excess, uncured liquid adhesive can be easily wiped away using an organic solvent such as Acetone, but a fully cured encapsulation layer requires specialized mechanical scraping or localized thermal softening to break down.

Does LOCTITE® AA 363 work on plastic substrates?

Yes, LOCTITE® AA 363 offers robust performance across standard electronic substrates, metals, glass, and select thermoplastics. However, because certain plastic material grades vary widely, they should always be evaluated prior to full-scale application to check for any risk of chemical stress cracking when exposed to the raw liquid un-cured adhesive.

Is LOCTITE® AA 363 safe for use in pure oxygen or chemical systems?

No. LOCTITE® AA 363 is not recommended or approved for use in pure oxygen setups or oxygen-rich systems. Additionally, it should never be selected as a sealant or adhesive barrier for chlorine pipelines, strong acids, or other highly aggressive oxidizing materials.