The advantages of FRP-strengthening have been shown time and again during the last decade. All over the world several thousand structures retrofitted with FRPs exist. There are various reasons why the retrofit is needed, but since buildings and civil structures usually have a very long life, it is not uncommon that the demands on the structure change with time. The structures may have to carry larger loads at a later date or fulfil new standards. The most common way to adhere the FRP composite to the structure is by the use of epoxy. This paper presents work where the epoxy has been replaced with a mineral based composite (MBC) for retrofitting of concrete structures. Pilot tests show that satisfactory composite action can be achieved