not completely free this allows the additives to come to equilibrium and condition the atmosphere so corrosion protection is guaranteed during storage or transport one embodiment of the invention may be a concentrate used to prepare a running in or hot test fluid it may be diluted as a second embodiment alternatively also a freezing protection base fluid like an alcohol or short chain organic acid can be added for those situations where freezing protection would be needed during storage or transport the addition of a liquid with increased viscosity relative to water to provide freeze protection further improves the protection level during storage and or transport as those freezing depressant fluids have a higher viscosity and are considered to be slippery they are not preferred unless freeze protection is really needed freezing point depressant may be present in the range from 10 to 60 vol preferably in the range from 30 to 50 vol a liquid alcohol or organic salt freezing point depressant component can be added to provide freezing protection the freezing point depressant can contain polyalcohols such as ethylene glycol di ethylene glycol propylene glycol di propylene glycol and glycerin and glycol monoethers such as the methyl ethyl propyl and butyl ethers of ethylene glycol di ethylene glycol propylene glycol and di propylene glycol ethylene and propylene glycol are particularly preferred as the freezing point depressant component non limiting examples of organic acid salt as freezing point depressant include.