I am currently on vacation in Mallorca, Spain. The car (Citroën C4 Picasso running on diesel) that I am driving is running low on coolant. I went to a gas station to buy a bottle of coolant for the car. On the bottle there is a label that reads "USO DIRECTO" and "10%" (I have attached a photo of the label). "USO DIRECTO" means "direct use" according to Google Translate. What does the 10% mean? (Normally you have to mix 50% coolant with 50% water).
OKAY! So I found the manufacturer's instruction page!
Under the heading
ANTICONGELANTE REFRIGERANTE AL 10%
They provide a "general information" section and a "directions for use" section. Based on Google Translate it says:
Being a product formulated for this temperature should be used pure, not recommending its dilution. Insert directly into the circuit by the expansion vessel, or in the radiator, which has previously been emptied, it is advisable before filling, carry out a cleaning to drag the dirt and barrel that might exist in the circuit.
I'm not 100% trusting of Google, so you can still ask someone to translate if possible.