Hot Melt Purge - Green HMP - 4 x 5LAreas of Application Green HMP is used in pre emptied hot melt systems and equipment from manufacturers such as Nordson, Valco Melton and Robatech, where the removal of old adhesive material is required or a change of adhesive is needed. Tanks and hoses can be cleaned in one simple action by circulating Green HMP through the hose system and looping it back into the tank to enable circulation, therefore cleaning both the tank and hose at the same time.