Originally Posted by Prophizee
have a lot experience detailing cars. Rule of thumb is any silicone based tire gel is very bad for the tires. If you are looking for an over the counter product Mothers Reflection tire shine is very good and won't hurt your wheels. If your looking for professional stuff, i personally use pinnacle tire gel it works great very natural and won't turn your wheel brown.
+1 for Pinnacle Black Onyx Tire Gel. Good stuff.