materials for repairing concrete, namely, concrete mix; tar; fire clay, namely, fire clay sold in powdered form for use in the manufacture of buildings, non-metal slabs of fire clay; concrete; building elements made of concrete, namely, blocks, bricks, posts, slabs, panels; cement; cement based products, namely, blocks, bricks, posts, slabs, panels; mortar for building construction; asphalt for construction; asphalt; asphalt felt