Retrofit Adhesive Fill System eliminates poor bonding and missed beads due to empty melter tanks. Adhesive Fill System minimizes tank and adhesive temperature variations for improved bonding. Adhesive Fill System is equipped with sensor that monitors the melter tank adhesive level, alerting the system to add small quantities of pellets, pastilles mini-slats of adhesive when needed. Retrofit Adhesive Fill System can be availed in different specifications to suit specific requirement.