Hi William,
Thank you for your question. The peel-and-stick is pretty aggressive. It is not very difficult at all to get straight. The peel-and-stick is on the one side that the door butts up to. The glue is sold separately and if you'd like to purchase the glue just note it in the Special Instructions or your order, and ask us to call you with a price. All 3 options work very well.
Thank you,
The Koffler Team