Rain X does not offer any rebates as of January 2016. Previously, the company's rebates required customers to purchase two sets of qualifying products in order to receive a gift card or check for about $10. Discount sites such as Rebate-Tracker.com offer information on past Rain X rebates.
Some of the company's past rebates have been tied to a particular retailer. For example, Walmart offered a trio of Rain X rebates in 2014, each of which provided a Walmart gift card for purchasing qualifying products at the retailer. Likewise, Napa ran a promotion in 2015 offering a $10 Visa gift card for purchasing two Rain X Latitude wiper blades from the company.
Rain X offers a Promotions tab on its website that showcases current discounts on its products. These deals are also tied to a particular retailer, and participating companies include Advance Auto Parts, Target, Auto Zone and Walmart.