I've been using TWTW for a couple of years now, and have never had any slinging problems. However, I never encountered the product forming a thick gel after application. I agree with Clean Dean that two coats are necessary. In addition, the tires must be clean and dry before application. Perhaps what you washed the tires with interacted with the TWTW to cause the gel and the slinging problem.
While I'm here, I tried TWTW as well as several other protectants on the rubber and plastic on my T-tops. After a rain I get a smeary line of the stuff running down the windows. I know it's runoff of the protectant. Anybody found something that doesn't do this?
