The fire in a warehouse in Zehdenick (Oberhavel) caused damage of around 500,000 euros.
People were not injured, as the police in Neuruppin announced on Thursday.
Paints are said to have been stored in the hall of a specialist company.
The fire broke out on Wednesday evening for as yet unknown cause.
The still great heat makes it difficult to investigate the cause of the fire, according to the information.
Zehdenick - An industrial chimney belonging to the building is threatened with collapse.
dpa