How can I make a polyurethane formulae more adhesive?

For a project I'm working on, how can I make polyurethane more adhesive and able to stick to surfaces more effectively, not necessarily super-glue like but just stickier properties. What other chemicals may I need to add, or would I need to also alter the main 2 ingredients? (isocyanate and polyol)


Also interested in making the formulae more medically stable, safe for skin and deeper wounds.


I would appreciate any input or answers!


