Hi dave..... sorry for the delay, in replying, havent been too well this past week or so... infact ive felt ROUGH, lol! Business is doing ok, lots of ups and downs like expected but for a new business, pretty incredible tbh.... But a LONG way to go, no where near out the woods ! I havent had much exposure to zymol concourse but will do dome reading and come back to you. Zymol is however one of my favourite car care producers, so good.