Superior Concrete Walls Precast Concrete Fence Wall is manufactured from an industrial strength concrete mix. While 40mpa is our minimum strength ordered, strength of up to 46mpa * is usually achieved. This forms strong, durable, long lasting precast concrete wall components. Utilising the best international concrete technology from Switzerland, Superior Concrete Walls precast concrete components are reinforced with SikaFiber PPM48/19**, developing a final product that is superior in every way to anything similar on the market nationwide.