1 Measure the water by putting together two moulds with water inbetween. Pour the water into a transparent bucket and draw a line on the bucket with a marker. Mix concrete and water according to the recommended ratio indicated on the Concrete Craft bucket.
2 Coat both moulds generously with ordinary cooking oil.
3 Pour the concrete mixture into the large mould. Press the small mould into the large mould so the edges of both moulds are flush.
4 Place a board (or similar) on top and hold it down with a stone or other heavy object. You may moisten the concrete edge in the space between the two moulds and smooth with a finger or a wooden spatula. Alternatively leave it to purposely make a very rough edge. Leave to dry for approx. 2 hours.
5 Remove the moulds. You may sand the edge. Leave to harden for approx. 24 hours.