Mike Stafford
I messed with resorcinol glue many years ago. It is a nasty mess that seems to get everywhere and is very hard to get off your hands. I don't know anything abut its shelf life.

Until the development of epoxy glues resorcinol was the "go to" glue. It was the only glue approved for use in airplanes with wooden fuselages. It was also commonly used in boat construction.

This cascamite glue only requires a bit of water in the correct proportions. I bought a jug of distilled water and some measuring spoons to measure the relatively small amounts of glue I need for these glue ups. I spread it out with 1/16" tooth spreader. It cleans up with water if you don't allow it to dry on the tool.