The oxirane functionality makes it useful as a reactive diluent for epoxy resin viscosity reduction.

[2] The product is manufactured by adding diethylene glycol and a Lewis acid catalyst into a reactor and streaming in epichlorohydrin slowly to control the exothermic reaction.

[5] The molecule has 2 oxirane functionalities, and thus does not at as a chain terminator but it modifies and reduces the viscosity of epoxy resins.

[6][7] These reactive diluent modified epoxy resins may then be further formulated into CASE applications: coatings,[8] (including antimicrobial versions[9]) adhesives,[10] sealants, and elastomers.

The use of the diluent does effect mechanical properties and microstructure of epoxy resins.