Tropic Asphalts operates a network of fixed Asphalt Plants across New South Wales & Southern Queensland. In addition, mobile Asphalt Plants complete that network with the ability to service projects across the country. Experienced paving crews, supported by high standard equipment, provide Tropic Asphalts with the ability to service both the retail market of routine maintenance for councils & State Road Authorities as well as to undertake specific projects for rehabilitation and new construction of state roads and airports. Headquartered in Newcastle Tropic Asphalts joined the COLAS Australia Group in 2013.

Sunstate Asphalt operates a fixed asphalt plant at Maryborough in the Wide Bay area of regional Queensland. Commissioned in late 2011 Sunstate Asphalt plant is Queensland Transport and Main Roads approved and supplies approved mixes to the maintenance market and private sector in the Wide Bay region. Sunstate Asphalt supports Sunstate Road Services asphalt paving operations that utilises a modern fleet of equipment to complete projects for Main Roads, local councils, airports and private customers. Sunstate Asphalt is a Barro Group and COLAS Australia joint venture established in 2014.