Since 1976, the Ontario Painting Contractors Association ("OPCA") has fostered collaboration to achieve success in advocacy, education, industry standards and labour relations. The OPCA represents the largest and most experienced employers performing painting and coating work in the industrial, commercial and institutional sector of Ontario's construction sector. The employers represented by the OPCA are bound to the International Union of Painters and Allied Trades, that, in turn, represent 10,000 workers in Ontario across various trade groups.