Tank-free hot melt adhesive delivery system for the packaging industry. The Graco InvisiPac keeps your packaging line up and running. It gives you great performance, even from low cost adhesives. Because of its tank-free design, adhesives spend less time at high temps, significantly reducing char and its negative side effects. Improve your ROI with faster startup, lass char, less nozzle plugging, less maintenance, and more production uptime.