I got the same deal at Eurocar parts a couple of weeks back, I also bought 3, used it for the 1st time Monday & I’m very impressed with it, water just beads off straight away, easy to apply, used it on the glass & the plastics with no issues. I reckon that turtle ? wax hydrophobic is amazing for the price, as good as some I’ve paid 4x the price for if not more, this stuff’s a keeper …
The tip I would give is make sure your RS is as clean as you can get it before applying, delighted with the results?
Lee