A list of South Australian buildings which may contain highly-flammable cladding will remain secret after the State Government refused a Freedom of Information request from the ABC.

The Department of Planning, Transport and Infrastructure has refused to provide the list of buildings identified through a statewide audit, citing among its concerns the impact on the department's "business affairs".

Meanwhile, the Victorian Government has moved to address public concern over dangerous cladding materials by announcing a $600 million package to fund major works after a similar audit found more than 1,000 buildings considered to be ‘high risk’ and 51 requiring emergency orders for urgent work.