In our testing the hydrophobic qualities are clear, rainwater beaded off the windscreen with ease and there’s none of that annoying juddering action with the wipers as seen with cheaper rain repellents. Be sure to apply it in both linear and circular motions, or you may end up with streaks in the glass. This makes Glaco Max Roll On ideal for city driving, but also long journeys and even in winter, reducing the build up of frost and ice! Moreover, this beading tends to pick up and carry away fresh dirt and grime, meaning that the sealed glass is partially self-cleaning.

The former relates to how you apply the Roll On – make sure to use both linear and circular motions to avoid streaks. It works well and helps to keep dirt off the windscreen, allowing them to see clearly out of their car. We tried the Roll On on both treated (using SOFT99 Glaco Compound) and untreated windscreens and the difference in performance was noticeable. To achieve the quoted durability and performance benefits, it is necessary to properly clean the surfaces to be treated in advance. Bought this thinking it would be brilliant on the Tesla Model 3 because it has a glass roof, well it is brilliant however there is only enough in the tube to cover the windscreen, roof and back window.Polishing the coating has become amazingly easy, and the strength of the bond guarantees durability for up to 4 months.

The beading starts at around 35 mph and is round and tight, and each application will last for between six to twelve months before needing to be reapplied.Thankfully the instructions are translated into English and stuck over the original packaging - a most welcome touch. So, where other longer-lasting products require foam applicator pads and can be waste a fair bit of product, SOFT99's offering should hopefully avoid both issues and be as simple to apply as Rain-X - but offer much longer protection. Originally developed for the aviation industry, we’ve been testing its glass polish and repellent to see if it’s any good. This kit will ensure your glass remains silky smooth and repels water, creating the legendary invisible wiper at speeds above 40mph. After application, let the coating sit on the glass' surface for 5-10 minutes, then wipe it off with a slightly damp towel or microfiber.