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SPX - Cross-linked Closed Cell Expanded Polyethylene

SPX: Cross-linked Closed Cell Expanded Polyethylene

As the leader in the local and international foam solutions, Sondor manufactures various cross-linked, closed-cell expanded polyethylene foam products. 

If you are looking for a material that will help keep your systems working at a high level while also decreasing the need for constant maintenance, Sondor has the solution for you. 

SPX is suitable for a wide range of applications such as expansion jointing, seals and gaskets, packaging and insulation of hot/cold water piping, to name a few.

What is SPX?

Expanded polyethylene (aka SPX foam) refers to foams made from polyethylene. It is manufactured from plastic pellets, and a blowing agent is used to expand the material in a mould heated by steam. It is primarily used in material for packaging goods as it is lightweight and flexible. It has excellent shock absorption and cushioning properties. SPX also has a tremendous weight to strength ratio and has a high thermal resistance. 

Advantages of SPX Foam

  • The SPX product range is free from CFCs and HCFCs.
  • SPX is resistant to dilute alkalis and acids, some oils, and weathering. It is also non-toxic and has excellent absorption characteristics. 
  • Fire retardant and rough cell SPX materials are also available. 
  • SPX foam is available in a variety of densities and colours

Properties of SPX Foam

  • SPX is available in a range of colours
  • Densities: 25, 33, 45, 60, 90, 120 kg/m3
  • Temperature: -20°C to 100°C
  • Shore hardness: "00" 39-53, 47-63, 43-73, 65-70 "A°" 23-32, 39-45, 44-54


Sondor products made with SPX Foam

  • Jointex - Lightweight, cross-linked, closed-cell, expanded polyethylene joint former with hinged temporary blocking piece
  • Polyclosures - Eave and ridge fillers made from SPX
  • Aquajoint - High density, cross-linked, closed-cell expanded polyethylene joint former for water applications
  • Sondor Buoyancy Foams made with SPX
  • Trailmat - An all-purpose foam mat used for the beach, laying by the pool, camping and for cushioning the body when exercising
  • Kickboard - A floatation aid for learning to swim
  • Aquajogger - An exercise floatation belt that can be used for fitness training, weight loss and rehabilitation
  • Polypython - A pool noodle for recreation in the swimming pool


With branches in Cape Town, Durban, Gauteng, Pretoria and Gqeberha, our knowledgeable representatives can advise the right solution for you. Find a branch near you for expert assistance. 



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