Our FibroMac™ polypropylene fibres are composed of extremely fine polymer filaments produced by an extrusion process.  Although synthetic fibres do not bring structural benefits to the concrete, they offer many other advantages.  Primarily they will protect the integrity of the concrete when it is subjected to high temperatures and direct heat, such as fires dramatically reducing thermal spalling.

FibroMac™ synthetic fibres also improve plastic shrinkage and freeze-thaw cracking.