Canopy glue is nothing more than "white" or "Elmer's" glue.

There is - ABSOLUTELY NO DIFFERENCE IN THE FORMULATION - only the price!

So you can use White or Elmer's glue instead.

The key is to lightly roughen up the surfaces with sandpaper, so the glue can adhere. It will not adhere to completely shiny surfaces.

This type of glue is used, so that the canopy can later be removed if desired without damaging the plane.