Profile: Crompton Mouldings Ltd. are manufacturers of rotationally molded products for the trade sector. Our Grit Bin is ideal for paths or minor roads. Our products are manufactured from durable compounded polyethylene. Our Composphere provides all the benefits of a tumbling composter, with the convenience of being its own wheelbarrow. It is made from recycled, UV protected plastic. Waterbutt is a slim line tank with patented diverter. We use 3D CAD modeling for designs.