From Longman Business Dictionary
insulatein·su·late /ˈɪnsjəleɪtˈɪnsə-, ˈɪnʃə-/ verb [transitiveT] to keep something safe from the harmful effects of somethinginsulate something from/against somethingSuch a strategy helps insulate the portfolio from the stock market’s volatility.
—insulation noun [uncountableU]The region’s insulation from oil price rises is now set to end.