Rubber Shield for rubber roof

Has anyone tried this product on their rubber roofs. It is suppose to do a good job of protecting the roof. Also has anyone used 303 on their roofs and if so how is it doing?

We've not used the Rubber Shield, but have used 303 for many years. We've only had this rig for a little over a year, but used it on the motorhomes with good results. It seems to do a great job at UV protection. I sold it for 10 years at the hot rod shop and never had a bottle returned. We use it on just about everything. I really like it on the car dash, as it repels dust and isn't greasy like a lot of the other stuff is.