Two problems: First, it's rarely clear what a specific glue actually is, in terms of chemical composition. Second, when there is an obvious 'alternative', it

Two problems: First, it's rarely clear what a specific glue actually is, in terms of chemical composition. Second, when there is an obvious 'alternative', it might be a different glue (different solvents, ingredients, etc) because of differing regulations. That could mean it handles differently.