WHAT IS TWISTER 40MM? It is a long-lasting, Synthetic Macro Fiber Reinforcement that can be used as primary reinforcement in concrete, has high strength, is polymer based, provides crack resistance and load bearing with two different materials in its composition. Twister is homogeneously dispersed in 40 mm concrete and provides the desired concrete appearance and strength with minimum labor and cost during and after pouring, and offers ease of application to projects.