Polyester Synthetic Microfiber

PSI FIBERSTRAND REPREVE 225 is a fine denier monofilament synthetic microfiber for concrete reinforcement manufactured from sustainably resourced polyester 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 0.5 lb/yd³ (0.3 kg/m³), PSI FIBERSTRAND REPREVE 225 microfibers will greatly reduce plastic shrinkage cracking when compared to plain concrete. PSI FIBERSTRAND REPREVE 225 microfibers also comply with applicable portions of the International Code Council (ICC) Acceptance Criteria AC32 for synthetic fibers. For every pound of PSI FIBERSTRAND REPREVE 225, up to 10 plastic bottles are diverted from landfills and instead used to reinforce concrete.

Features & Benefits

  • Controls and mitigates plastic shrinkage cracking
  • Reduces segregation and bleed-water
  • Provides three-dimensional reinforcement against micro-cracking and spalling
  • Increases surface durability and improves fire, 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
  • Sustainably resourced with low environmental impact
  • Over 300 million fibers per pound


  • Slabs-on-grade, sidewalks, driveways, parking lots, curb work, overlays and toppings
  • Footings, foundations, walls and tanks
  • Stucco applications
  • Precast and prestressed structures
  • Shotcrete and slope paving
  • Spalling control and fire protection
  • Composite steel deck
  • Stamped and colored concrete

Specifications / Compliances

  • ASTM C1116
  • ASTM D7508
  • ICC Acceptance Criteria AC32


1.0 lb (0.45 kg) water soluble bags. Special packaging configurations are also available upon request.