mineral oils, mineral fats (certain additives can have a destroying influence), hydraulic fluids on mineral oil basis, silicone oils and silicone greases, biologically degradable hydraulic fluids, aliphatic hydrocarbons (e.g. propane, butane, gasoline), inflammable hydraulic fluids from the HFA and HFB group, sea water and hot water up to +90°C, diluted acids and caustic solutions.