SEDEX MINING CORP.

FOR IMMEDIATE RELEASE

www.sedexmining.com

TSX-V: SDN                                                                                                                                               

May 27, 2008                                                                                                                                              

Gold Potential to be Drill Tested at Sedex?s Flint Lake Property

Sedex Mining Corp. (TSX.V: SDN) is pleased to announce the commencement of a four-hole 800 m Diamond drill program on the Flint Lake gold property near Sioux Narrows, Ontario.

The Flint Lake property lies along the same Pipestone Fault system that hosts Nuinsco?s Cameron Lake Mine and Houston Lake Mining?s Dubenski property.  The Cameron Lake mine is 2 km to the southeast and hosts a 43-101 compliant measured and indicated gold resource of 120,300 ounces.   The Dubenski property abuts the Flint Lake property to the west and recently yielded drill results as high as 256.94 g/t gold over three metres.  Gold mineralization for both properties occurs within quartz-sericite-pyrite schists along east-west structural splays off the Cameron-Pipestone Fault.  The Flint Lake shear hosting the Dubenski gold showing potentially strikes across the Flint Lake property.

The Flint Lake Property is dominated by gabbroic sills interspersed between east-west trending low lying swampy terrain.   Drill targets on the property consist of coincident Mobile Metal Ion (MMI) gold soil anomalies, Induced Potential (IP) anomalies, and historic gold in traditional ?C? horizon soils.  These targets are on strike with the gold bearing Dubenski shear and the Cameron Lake gold mine.

Andrew Tims is the qualified person for the purposes of National Instrument 43-101 for the Company's Flint Lake Property and has reviewed the contents of this press release.

About Sedex Mining Corp.

Sedex is well positioned to discover and capitalize on world class gold, silver, copper, nickel and zinc deposits.  During the last couple of years the Company has strategically accumulated large land packages in existing mining or mineral districts such as the Abitibi in Ontario.  These properties have existing infrastructure and are often within road access to metallurgical facilities to process mined ores.  Details relating to exploration activities on specific properties will be announced during the coming months as the work program is implemented.  

CONTACT INFORMATION

For further information contact:      Alan Campbell or Kevin Hull, Hughes Exploration Group
Phone: (604) 685-2222

Website: www.sedexmining.com

The statements made in this news release may contain forward-looking statements that may involve a number of risks and uncertainties.  Actual events or results could differ materially from the Company's expectations and projections.

The TSX Venture Exchange does not accept responsibility for the adequacy or accuracy of this news release.