After nine years of VX220 (weekend car) & the last two years of A4 Cab roof proofing the best product by far in my experience is this Interior Coatings // G|Techniq Ive used Renovo & Autoglym products but I think this is a much better product. The beading & water sheeting is nothing short of remarkable. I'm nothing to do with the company. I just thought I'd share what I've discovered over the last nine years of re proofing my soft tops. This is my A4 Cab roof a couple of months after being treated.