Synthetic Microfiber, Monofilament Nylon

PSI FIBERSTRAND N is a monofilament nylon micro-fiber for concrete reinforcement that complies with ASTM C1116, Standard Specification for Fiber Reinforced Concrete and Shotcrete, and is specifically designed to help mitigate the formation of plastic shrinkage cracking in concrete. Typically used at a dosage rate of 1.0 lb/yd³ (0.6 kg/m³), PSI FIBERSTRAND N microfibers comply with applicable portions of the International Code Council (ICC) Acceptance Criteria AC32 for synthetic fibers.

Features & Benefits

  • Controls and mitigates plastic shrinkage cracking
  • Reduces segregation and bleed-water
  • Provides three-dimensional reinforcement against micro-cracking
  • Increases surface durability, impact and abrasion resistance
  • Reduction of in-place cost versus wire mesh for non-structural temperature / shrinkage crack control
  • Easily added to concrete mixture at any time prior to placement


  • Shotcrete and pool construction
  • Slabs on grade
  • Pre-cast units and slip form curbs
  • Sprayed and plastered cement
  • Decorative concrete

Specifications / Compliances

  • ASTM C1116
  • ASTM D7508


FIBERSTRAND N micro-fibers are packaged in 1.0 lb (0.45 kg) and 5.0 lb (2.27 kg) water soluble bags. Special packaging configurations are also available upon request.