LOCTITE® AA 3381 LC is a clear, medium-viscosity, light-curing acrylic adhesive designed for bonding plastics, metals and glass. It provides rapid UV or visible light cure and produces a tough, flexible, transparent bond suitable for precision assemblies.
LOCTITE® AA 3381 LC is developed for manufacturers who require a clear, flexible and durable bond in assemblies where appearance and performance are equally important. This adhesive cures quickly when exposed to UV or visible light, allowing fast throughput on production lines. Its medium viscosity supports controlled dispensing with reduced migration, making it effective for small components, channels and tight fit-up areas. Once cured, the bond maintains flexibility, allowing it to absorb movement, impact and thermal expansion without cracking. The LC grade ensures a low-chlorine formulation, making it suitable for electronics, medical devices and sensitive components. It is ideal for applications involving plastics, glass and metal combinations that require a dependable and aesthetically clean bond.
Cure method: UV or visible light
Viscosity: medium, suitable for controlled application
Appearance: clear before and after cure
Bond characteristics: flexible, transparent, durable
Substrate compatibility: plastics, metals and glass
Typical uses: optical components, device housings, clear plastics, electronic assemblies, plastic to metal bonding
Primary Chemistry:
Acrylic ester, light cure
Prevents bond cracking caused by rigid adhesives in assemblies exposed to movement or thermal cycling. Eliminates production delays associated with slow curing systems or multi-part adhesives. Maintains appearance in transparent or cosmetic components where clarity is essential. Reduces waste from adhesive run-off or inconsistent dispensing. Supports low contamination requirements in electronics, medical devices and high precision components.
Apply LOCTITE® AA 3381 LC to clean, dry surfaces. Assemble parts and expose the joint to UV or visible light to initiate rapid cure. The adhesive forms a flexible and transparent bond suitable for components that experience movement or temperature variation. Common applications include electronic housings, transparent covers, medical device assembly, plastic-to-glass bonding and small precision parts requiring clarity and strength.
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