LOCTITE 4307 Light Cure Instant Adhesive is a one-component cyanoacrylate and UV-curable bonding solution developed for assemblies that require rapid fixturing, fast surface cure, and a clean finished appearance. Its dual-cure technology combines ultraviolet or visible-light curing on exposed areas with a secondary moisture cure in regions shielded from light. This makes it an efficient choice for precision manufacturing, disposable medical device assembly, electronics, plastic components, rubber parts, and metal bonding where speed, process control, and minimal blooming are important.

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LOCTITE 4307 Light Cure Instant Adhesive for Rapid Production

Traditional instant adhesives may cure quickly between close-fitting surfaces but can leave exposed fillets or excess adhesive tacky for longer periods. LOCTITE 4307 addresses this challenge by allowing illuminated surfaces to cure rapidly under a suitable UV or visible-light source. The exposed adhesive can reach a tack-free condition in only a few seconds under validated light intensity, helping production teams reduce waiting time and move assembled parts to inspection or packaging more efficiently.

The product is supplied ready to use and requires no mixing. Its liquid consistency supports accurate dispensing through fine needles, automated systems, or controlled manual applicators. With a typical viscosity range of approximately 600 to 1,200 mPa·s at 25°C, it can wet narrow bonding areas while remaining practical for precision component assembly.

LOCTITE 4307 Light Cure Instant Adhesive Performance Advantages

LOCTITE 4307 Light Cure Instant Adhesive bonds many plastics, rubbers, and metals. Typical fixture times vary according to substrate, joint design, temperature, and humidity. Under non-light-curing conditions, the official technical data shows rapid fixturing on materials such as ABS, grit-blasted aluminum, neoprene, steel, polycarbonate, phenolic resin, and PVC. Low-surface-energy plastics such as polyethylene and polypropylene may require LOCTITE SF 770 Primer or another validated surface treatment.

The light-curing function minimizes blooming around exposed adhesive areas and provides an alternative to solvent-borne accelerators. This is especially valuable for transparent housings, precision components, medical disposables, and assemblies where appearance and cleanliness influence final product quality. Positive fluorescence under UV inspection light also helps operators verify adhesive placement during quality control. Under the stated laboratory cure conditions, the cured material shows a Shore D hardness of approximately 82 and a tensile strength of about 33.4 N/mm².

Henkel identifies the product as suitable for disposable medical device assembly and states that it has been tested according to Henkel protocols based on ISO 10993 biocompatibility standards. Manufacturers remain responsible for confirming suitability, sterilization compatibility, regulatory requirements, and performance in the final device.

How to Apply LOCTITE 4307 Light Cure Instant Adhesive

Clean the bonding surfaces thoroughly before application. Remove oil, dust, moisture, fingerprints, release agents, and other contamination that may reduce adhesion. Dispense a small, controlled amount onto one surface, assemble the parts immediately, and maintain accurate alignment during the initial fixture period.

Expose accessible adhesive fillets and surfaces to a compatible UV or visible-light curing system. Cure performance depends on wavelength, irradiance, exposure time, lamp distance, adhesive depth, and substrate transparency. The official data references curing measurements at 365 nm, but every production line should establish validated settings using the actual equipment and component geometry.

Areas that do not receive direct light can continue curing through atmospheric moisture. For best results, keep bond gaps controlled and allow sufficient time for complete secondary cure. Avoid excessive adhesive because large deposits may increase cure time and create unnecessary squeeze-out.

LOCTITE 4307 Light Cure Instant Adhesive offers manufacturers a practical combination of rapid fixturing, dual curing, minimal blooming, fluorescent inspection, and broad substrate capability. It is an excellent purchasing option for high-speed assembly lines that need dependable bonding for medical devices, electronics, plastics, rubbers, and precision industrial components.

industrial instant adhesives

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