protectant for top

[oldforder]

My new to me 29 Tudor has a very new top on it. I assume it is some sort of cloth backed vinyl. It is the stuff sold by one of the model A suppliers, I think probably Mac's as I got some other new parts with the car and they were from them. I want to know what is a good product to protect this material from the elements for long life. I want something that I can go to wal-mart to buy and not have to order on line. Even though this car will spend most of its life in the garage, I think I would like to put some protection on it. Unless they best thing is nothing.