Endozym Antibotrytis is a purified enzymatic preparation, possessing activities useful to solve problems deriving from the presence of Botrytis Cinerea in the must. Endozym Antibotrytis indirectly acts towards polyphenoloxidases (tyrosinase - laccase) present in the must, inactivating them and enabling aromatic precursos to be preserved together with the colouring matter. Endozym Antibotrytis should be used in association with normal clarification and colour extraction enzymes. The treatment with Endozym Antibotrytis is decisive in musts obtained by grapes heavily attacked by grey mould, responsible for problems which can not be solved either by sulphur dioxide or by other technological solutions.