MDS is the leader in wholesale distribution of industrial janitorial, sanitation products Helping your small distribution business grow Master Distribution Services has been a leading Canadian wholesale distributor of Janitorial, Sanitation, Industrial Commercial and Food Service products for over 25 years. Our customer base is predominantly small, independent distributors, although we also service large distribution houses. Drawing from our 7,000-product inventory, we ship to clients coast to coast across Canada. more... See more text