Problem with Ride-On tire balancer/sealant

This product is supposed to provide protection from small punctures as well as balance the tires without using wheel weights. A month ago I installed a pair of Metzeler FeelFree tires and put in the recommended volume of Ride-On. The balance seemed very good after an initial 10 mile ride and for most of the time since. Most of my riding is up to 55 or 60.

However, last week I was on a freeway and had to do 70+. I got an awful vibration. I have checked the bearings and tires and found no abnormalities. I called the company and they said that they only get one or so call a month for this problem. They suggested taking the bike to a dealer, have him carefully remove the wheels and then spin balance them. Sounds like a $100+ idea to me!

As far as I'm concerned, Ride-On is junk. Expensive junk at that. It's $14.95 per bottle (3 needed) plus shipping. This product has had some good reviews, but I'd definitely not recommend it after my experience.