calcium glue
White glue
Yu have to use school glue
Gluefast paper glue.
Silicone will do that.
If gluing paper to paper, white glue is best.
you use a non toxic nail glue
Elmer's new China and Glass Glue.
Any kind of epoxy is best for this
Most envelopes are pre-glued with 'gum arabic'
I would use gorilla glue, that stuff will glue just about anything together. Make sure to use only a little bit, it expands and "foams" when drying.
White glue is good for that.