That is it, but it seems to be very expensive. In the US, it is commonly sold in building supply and hardware stores as a cleaner for concrete, masonry and bricks. It is not very agressive on human skin, but the fumes are an eye and respiratory tract irritant. Use it outside, stay upwind of it and you won't need a respirator. I do recommend chemical goggles in case of splashes. If the 50-50 mix doesn't seem to be working fast enough, you can use it full strength while you watch it work.

OB