Abstract: Disclosed is an improved sealant useful with electrochromic or similar type displays having an acidic electrolyte hermetically sealed between spaced substrates, the sealant providing an inner seal chemically formed in situ at the interface with the electrolyte by reaction therewith and an outer seal surrounding the inner seal. The sealant preferably comprises a mixture of acid resistant epoxy resin and a curing agent, for example, amine or amide, the curing agent reacting with the acidic electrolyte at the interface to form a water-repellant reaction product constituting the inner seal and also reacting at remaining areas of the sealant surrounding the interface to cure the epoxy resin and thereby form the outer seal. In the inventive method, the sealant is at the most only partially cured prior to introduction of the electrolyte into the display so that there is some free curing agent present to react with the electrolyte at the interface and form the inner seal.