How to use a 3M coupon
Subscribe to 3M's email list to receive subscriber-only deals and notices of sales before they happen. Look for their rebate deals on the website to get cash back in the mail for certain purchases. You will find several coupon codes good for different perks on their Facebook page that are available to their fans only. Once you're privy to the codes by becoming a fan, shop the 'On Sale' and 'Special Offers' sections of the site to find the best combination of promotions to save the most.