Abstract: Actinic radiation and moisture dual curable epoxy compositions and methods of curing such compositions are disclosed. The compositions comprise an alkoxysilane and epoxy dual functional oligomer comprising a functional group curable by actinic radiation, a functional group curable by moisture, and a functional group chemically linking the functional group curable by actinic radiation and the functional group curable by moisture; catalyst configured to react with the functional group curable by moisture in the presence of water; and at least one photoinitiator. The compositions are particularly useful for wearable electronics and medical devices. In some embodiments, unexpected results are obtained in the ability to use cationic photoinitiators and/or in avoiding the need for acrylates and/or heat curing.