Did a quick search and couldn't find this posted yet.
Chemical Guys via Amazon is having their Wheel Guard Rim and Wheel Sealant for $13.97 + taxes, lowest ever according to CCC.
Or you could enjoy an additional 15% off when you Subscribe & Save, for a final price of $11.87 + taxes.
Prices usually hover at around $17-$20 on Amazon.
4.1/5.0 on Amazon, based on 224 reivews.