Use of Monofilament Polypropylene Fiber (Fibrin 23) as Additive to Concrete Mix. Category: Department OrderSub Category: construction-materialsSeries: 2005No: 95File: DO_095_S2005.pdfDate: Wednesday, November 30, 2005Tags: Monofilament 095 Polypropylene Fiber Fibrin 23 materials Read more about Use of Monofilament Polypropylene Fiber (Fibrin 23) as Additive to Concrete Mix.