Heidelberg Materials 40N Concrete (C32/40) is a high-strength, ready-to-mix blend designed for structural and general construction applications where durability and compressive strength are essential. Engineered to exceed a 40N/mm² compressive strength when mixed to a target slump of S2 (50–90 mm), this mix provides consistent results across a wide range of site conditions. Its low thermal resistance also makes it suitable for use around cable ducts or installations where temperature control is important. Supplied as a dry mix, it's convenient and easy to use on site.