Paul Haelg (C), chairman of the board of Swiss chemicals group Sika, is seen on a TV screen as he addresses the company's extraordinary shareholder meeting in the town of Baar July 24, 2015. The board of Swiss chemicals firm Sika said on Friday it would cap the voting rights of its controlling shareholder at 5 percent at an extraordinary general meeting, amid a disputed takeover by Saint-Gobain. REUTERS/Arnd Wiegmann