FORTA ECONO-MONO is an easy-to-finish, fully oriented, 100% virgin homopolymer polypropylene monofilament fibrous reinforcement. This economy grade fiber offers long-term durability, and functions as a plastic shrinkage reinforcement intended to reduce the formation of shrinkage cracks prior to initial set and to reduce settlement shrinkage. FORTA ECONO-MONO is non-corrosive, chemically inert, and 100% Alkali Proof!