The agency won the business after a pitch against Karmarama and The Brooklyn Brothers. The process, which kicked off in August last year, was led by Ideal Standard's chief marketing officer, Kerris Bright, and handled by Oystercatchers.
Euro RSCG pitched for the account alongside the design shop FutureBrand, and the agencies will develop a new communications and design strategy for Ideal Standard to help revamp the brand's identity across Europe.
Ideal Standard, which also owns local brands such as Armitage Shanks in the UK, hired Bright as its first chief marketing officer in February last year. Before that, she was the head of global marketing at British Airways and the chief marketing officer at AkzoNobel, where she worked with Euro RSCG on the Dulux ad business.
Bright said: "We were impressed by Euro RSCG's planning, creative and integrated capabilities and by FutureBrand's creative flair, category insight and attention to detail."
Russ Lidstone, the chief executive at Euro RSCG London, said: "Ideal Standard is a fantastic business focused on innovation and design. There is a great opportunity to bring this to light and we look forward to helping it do so."