Well, been having issues with the canvas convertible top on my 1997 Saab 900s. I tried 303 protectant and Ragg Topp. Let me tell you, I believe that Ragg Topp was probably one of the worst products I have used. Now the 303 protectant worked wonderful and the water beaded off the top effortlessly. This is the same top that was like a coffee filter and drenched me every time it rained. Thank God there is a decent product out there to salvage tops that need waterproofed again. Just my .2 cents.