Henkel LOCTITE AA 3301 UV Light Cure Medical Device Adhesive for PVC to Polycarbonate

LOCTITE AA 3301 UV Light Cure Adhesive for Precision Assembly

The adhesive has a typical viscosity of approximately 150 mPa·s at 25°C, with Henkel listing a general range of 90 to 210 mPa·s. This low viscosity supports accurate dispensing through needles and automated valves and helps the material wet close-fitting surfaces. Because the product remains liquid until exposed to sufficient light, operators can position and inspect components before initiating cure. Under suitable UV or visible-light intensity, fixture time can be approximately five seconds, helping shorten production cycles and reduce work-in-process inventory.

LOCTITE AA 3301 UV Light Cure Adhesive is flexible after curing and helps improve load distribution and shock absorption within the bond area. Typical cured properties include Shore D hardness of approximately 69, tensile strength of about 19 N/mm², and elongation at break of around 50%. These balanced properties support durable joints while reducing excessive stress on sensitive plastic components.

Medical Device and Multi-Substrate Bonding Applications

The product is primarily designed for joining polycarbonate to flexible or rigid PVC. Typical applications include medical tubing assemblies, fluid-handling components, connectors, disposable diagnostic devices, clear plastic housings, reservoirs, and other components requiring precise alignment and rapid curing. It also demonstrates adhesion to glass, many engineering plastics, and most metals, making it useful for selected industrial, optical, and electronic assemblies.

Henkel has tested LOCTITE AA 3301 to internal protocols based on ISO 10993 biocompatibility standards to assist medical-device material selection. Final device compliance remains the responsibility of the manufacturer, and representative parts should be evaluated after the intended sterilization, ageing, fluid exposure, and operating conditions.

7 Key Benefits of LOCTITE AA 3301 UV Light Cure Adhesive

• One-component formulation with no weighing or mixing.
• Fast UV and visible-light cure for high-speed production.
• Low viscosity for narrow gaps and close-fitting components.
• Excellent suitability for bonding PVC to polycarbonate.
• Flexible cured bond for shock absorption and load distribution.
• Transparent appearance for clean and visually controlled assembly.
• ISO 10993 testing support for selected medical-device applications.

Application and Light-Curing Guidance

Bonding surfaces should be clean, dry, and free from grease, dust, moisture, mould-release agents, and other contaminants. Dispense a controlled quantity onto one surface, assemble the components, and expose the bond line to a validated UV or visible-light source. Cure speed and depth depend on irradiance, wavelength, exposure time, bond-line thickness, and the light transmission of the substrate.

The adhesive is light sensitive, so exposure to daylight and strong artificial lighting should be minimized during storage and dispensing. Black feed lines are recommended for automated systems. Cooling may be necessary for temperature-sensitive thermoplastics, and each plastic grade should be tested for potential stress cracking before production approval.

Official Resources and Related Light Cure Adhesives

Review the official Henkel LOCTITE AA 3301 product page and official LOCTITE AA 3301 technical data sheet for current technical values, curing recommendations, safety documents, and regional packaging.

Explore our light cure adhesives for additional UV and visible-light products, or browse our medical device adhesives for plastics, glass, metals, and disposable assemblies. Contact our sales team for quotations, 25 ml syringe availability, technical documentation, dispensing equipment recommendations, and export support.