Sintex Industries (SIL) will turn ex-date (on Thursday) for the proposed demerger of the custom moulding business and prefab business to Sintex-BAPL and Sintex Infra Projects, wholly owned subsidiaries of Sintex Plastics Technology (SPTL). The scheme involves issuance of equity shares of SPTL to the shareholders of SIL so that the latter will get one share of SPTL upon demerger for each share held. Later, it is proposed to list the shares of SPTL on the BSE and the National Stock Exchange.