Epoxy resin has become a rather common cause of eczematous contact dermatitis. The most frequent areas of involvement are the hands and forearms. The opportunities for industrial exposure are many and diverse. A suitable patch test concentration is 1% Epoxy resin in petrolatum.
Gaul LE. Prevalence of Epoxy Resin Dermatitis. Arch Dermatol. 1967;96(3):227-230. doi:10.1001/archderm.1967.01610030005001