Arbour

Hi. I have a petrol Yeti 1.2 TSI 2011 model. It's coolant level has dropped right down and warning light is on. From my last car 2 years ago, I've got some pink Halfords OAT silicate-free concentrated coolant, and called Halfords to check if I could use it as I need to be able to at least drive to a garage so they can look for a leak! Their system is down so they can't check if it's OK for this Yeti and I can't find info on what code this collant is (G12. G13??) Looking at car manual and other websites, looks like I need G13 - and it should be with silica, not silica free? Does anyone know? I also noticed I'm supposed to mix concentrated collant with dionised water, but never knew that and don't have any! Any help much appreciated.