Mainstreet Credit Union ← View details 1295 London Road, Sarnia, ON N7S 1P6 +1 519-542-9059 mainstreetcu.ca Suggest an Edit Name* State* Locality* ZIP* Street address* Phone* Website Opening hours Monday: 09:00 am — 05:00 pm Tuesday: 09:00 am — 05:00 pm Wednesday: 09:00 am — 05:00 pm Thursday: 09:00 am — 06:00 pm Friday: 09:00 am — 06:00 pm Saturday: 09:00 am — 01:00 pm Your comments * — Required information