Mainstream Provides Default Status Update

TORONTO, ONTARIO--(Marketwired - May 5, 2015) - Mainstream Minerals Corporation (TSX VENTURE:MJO) (the "Company") is providing a default status report in accordance with the alternative information guidelines set out in National Policy 12-203 - Cease Trade Orders for Continuous Disclosure Defaults ("NP 12-203").

On April 7, 2015, the Company announced (the "Default Announcement") that it would not be able to file its annual financial statements and management discussion and analysis for the year ended November 30, 2014, together with the related certification of filings under National Instrument 52-109 - Certification of Disclosure in Issuers' Annual and Interim Filings (collectively, the "Continuous Disclosure Documents") by the prescribed deadline of March 30, 2015.

Except as discussed below, there have been no material changes to the information contained in the Default Announcement or any other changes required to be disclosed under NP 12-203.

The auditors of the Company have initiated the audit and the Company anticipates that the Continuous Disclosure Documents will be filed by May 31, 2015. The Company will continue to provide bi-weekly updates, as contemplated by NP 12-203, until the Continuous Disclosure Documents have been filed. In the event that the Company does not file the Continuous Disclosure Documents by May 31, 2015, the Canadian Securities Regulatory Authorities may impose an issuer cease trade order on the outstanding securities of the Company. The Company intends to satisfy the provisions of the Alternative Information Guidelines during the period it remains in default of the filing requirements.

Neither the TSXV nor its Regulation Services Provider (as that term is defined in the policies of the TSXV) accepts responsibility for the adequacy or accuracy of this release and has neither approved nor disapproved of the contents of this press release.

This news release may contain forward-looking statements including but not limited to comments regarding the timing and content of upcoming work programs, geological interpretations, receipt of property titles, potential mineral recovery processes, etc. Forward-looking statements address future events and conditions and therefore, involve inherent risks and uncertainties. Actual results may differ materially from those currently anticipated in such statements.