LOCTITE® 4306LC is a transparent, low-viscosity light cure cyanoacrylate adhesive that also cures via humidity. It provides rapid fixture in under five seconds when exposed to UV or visible light. This dual cure system minimises blooming and avoids the need for accelerators, ensuring a tack free finish and enabling fast assembly processes.
LOCTITE® 4306LC is formulated for bonding close-fitting parts across varied materials including metals, plastics and rubbers. The light cure component ensures quick surface fixture while humidity cure addresses blind or shaded areas, delivering a robust bond throughout. Biocompatible to ISO 10993, this product is ideal for disposable medical devices. The cured adhesive offers rigidity, low blooming, UV fluorescence for inspection and resistance to common environmental stresses.
Viscosity ranges from 10 to 35 mPa·s (cone & plate at 3000 s⁻¹)
Specific gravity approximately 1.05 @ 25 °C
Flash free surface cure achieved in under five seconds with 100 mW/cm² @ 365 nm light source
Shear strength on steel ~20 N/mm² (2950 psi) ()
Elongation at break roughly 2.2 %
Service temperature range –40 °C to +100 °C ()
Primary Chemistry: Ethyl cyanoacrylate with photoInitiator
Reduces assembly time with fast surface fixture and complete cure capability Prevents aesthetic issues from blooming associated with solvent cures Provides visible verification of adhesive coverage via UV fluorescence Enables safe bonding in medical and clean room applications due to biocompatibility
Use LOCTITE® 4306LC where fast fixturing and full-cure performance are critical, such as in medical devices, electronic components, and hybrid material bonding. Apply to both surfaces, flash cure exposed areas with UV or visible light, then allow humidity cure in shaded zones. UV fluorescence assists in confirming coverage. Suitable for bonding metal, plastic and rubber substrates without primer or mixing.
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