UV curable epoxy offers excellent adhesion and reliability thanks to its epoxy backbone, rather than an acrylate backbone. It delivers low shrinkage and resists oxygen inhibition, since oxygen doesn’t quench its cationic photoinitiators. This epoxy also supports “dark” cure, meaning it can continue curing even without UV light exposure. This allows a small degree of curing in areas the UV light never reaches, within a limited distance. Most formulas support thermal post-curing for a greater degree of conversion than UV cure alone provides, though initial UV cure is required for the best post-cure results.
