Polyisocyanurate (PIR)


PIR is manufactured from a mixture of two principal liquid components and a number of additives to produce highly cross-linked polymers with a 90% closed cell structure providing  an excellent resistance to moisture penetration.Typical applications include: Oil Refinery, chemical process plant, cryogenic and Liquid gas plants, Rail and Marine transport, Refrigeration pipe work, Food processing, brewery industries and MOD applications.Standards Include: BS5608:1993, BS 4840: Part1:1985, BS 4840: Part2:1994, BS 5422: 1990, BS5970: 1992.Densities available; 35kg, 50kg, 60kg, 80kg, 120kg & 160kg.  Other densities are available on request.

Product Benefits

  • Dimensionally Stable
  • Closed cell Structure & excellent moisture resistance
  • Lightweight, Strong & Rigid
  • Resistant to many chemical solvents and oil
  • Low thermal conductivity
  • Non Fibrous
  • Oil Resistant
  • Proven Track Record


Available Forms:Flat SlabPipe SectionsPipe SupportsRadiused & Bevelled LagsSegments for knucklesDome End SegmentsBends & ElbowsFlangesReducersTeesValves
Enquire Now

Sign up to our newsletter