RichFiber offers a complete line of synthetic, polypropylene, AR glass, steel, and steel blend fibers to handle all your concrete reinforcement needs. Water – Cement ratio, aggregate size, and sand size variation influence plasticity and shrinkage within your concrete mix. RichFiber concrete fibers significantly reduces risky parameters by creating a maximum distribution of reinforcing filaments throughout your mix to stop cracking before it forms, while improving the durability and overall physical properties of the concrete itself.