Dual Cure UV Adhesives

Optimax® cationic and dual cure UV adhesives such as 6439 and 6440, engineered for complete polymerisation in shadowed and opaque areas via dark cure chemistry.

What is a cationic or dual cure Optimax® UV adhesive?

Optimax® cationic/dual cure adhesives such as 6439 and 6440 cure under UV light and also via a secondary mechanism (heat or activator), ensuring complete polymerisation in shadowed or opaque areas. Unlike free radical systems, cationic chemistries continue curing even after the UV source is removed, a phenomenon known as "dark cure". This is particularly valuable for thorough cure in micro-gap regions and beneath opaque substrates. Ideal for complex assemblies in medical, automotive, or electronics manufacturing.

Why choose a dual cure adhesive over a standard UV adhesive?

Dual cure adhesives ensure bond integrity where UV light cannot fully penetrate, improving mechanical strength and reliability for parts such as medical instruments or automotive plastics.

What are typical applications?

Glass, metal, and ceramic bonding
Automotive plastic assemblies
Analytical and electronic instruments
Shadowed joints where light access is limited
Electronics assembly
Medical device assembly
Optical bonding

How do I know if dual cure is required?

If your assembly has opaque components or deep cavities, dual cure grades like 6439 or 6440 guarantee full curing and high bond strength.

Can these adhesives be used for structural bonding?

Yes, dual cure adhesives deliver strong, durable bonds for high-stress or mechanically demanding assemblies.