Our search for a quality structural fiber that would not show in the surface led us straight to the manufacturer of PVA (Poly Vinyl Alcohol) fiber. RECS15, RECS100, RFD400 and RF4000 Create a covalent bond to the concrete creating an internal reinforcing that supersedes traditional methods. Added benefits include higher flexural strength, more impact resistance and greater resistance to both map cracking and plastic shrinkage. RECS15: 8mm fiber for GFRC face, backer, and SCC applications. Excellent dispersion, medium to low dose. Used alone or in conjunction with other fibers.