High compressive strength of fiber concrete spacers ensures that the spacersremain in place before and during concreting (plastic spacers are subject todeformation under high loads)Fiber concrete spacers have better bonding with in-situ concrete. As a resulthairline crack formation is discouraged (hairline cracks are often seen whereplastic spacers are used)Fiber concrete spacers can allow construction of surfaces that are impermeableto waterFiber concrete spacers are more cost-effective as compared to plastic spacersFiber concrete spacers are fire resistant and not attacked by alkalies