Glycol / TKS fluid and where to buy it

I lately purchased some from www.aircraftspruce.eu the big advantage was that they seem to handle it like an other item regarding shipping (probably up to 20l per order due to weight) and simply put it in a normal package. The others like areosense wanted to hire some specilised dangerous goods company etc. They seem to ship up to 20 litersl to the UK for less than 30 Euro shipping charges.

. . . . dangerous goods – ridiculous. I can mail order all sorts of thinners in 10 , 20, 30 l canisters, no problems. These fluids are really dangerous, but TKS ?? Seems like excuses for outrageous postage costs. Vic

https://eshop.ecoliquid.eu/en/de-icing-fluids/

Does anyone know if all “TKS” fluids can be mixed?

I used Wittig Ultra blue but that’s now also more then two years ago something like 63 euro for 80L shipment cost from DE to BE