UMITAN RS / ML CONC. powd retanning is a resin based on melamine, which confers to the leather round hand, full, flower end and closed, especially in the most empty parts of the leather. UMITAN RS / ML CONC. given its anionicity, is compatible with all tanning agents and dyes, anion-active. UMITAN RS / ML CONC. can be used for nubuck and suede items because it improves the ability porbeagle.