For PERMANENT installation of regular iron-on Monokote (I used this exclusively on my Edge 540), on top of Monokote [without using heat] I used a mix of 50% Detergent Ammonia...like you see on the soaps aisle in the market. 4 oz ammonia, 4 oz. tap water, spray on. Lay the iron-on Monokote in place where desired, and squeegee carefully until almost all of the solution is squeegeed off. This smells - ammonia is strong - but leaving the pieces alone in a dry place overnight results in permanent adhesion of the Monokote, and you don't need to iron it - ever - and no bubbles. Try it!