IXPE/XPE and EPE foams have very good compression resistance and recover their shape after load. Permanent deformation is minimal when the material is used within the recommended limits.

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Compression behaviour is critical when PE foam is used under flooring, as a gasket or in vibration-damping applications. Crosslinked materials (Isolon 300/500) show higher stability and low permanent deformation.

Compression and recovery behaviour

Based on typical grades supplied by LIRIDA-M:

  • Crosslinked IXPE/XPE (Isolon): maintains thickness under load and recovers quickly after removal;
  • Non-crosslinked PE (Warmlex): more flexible and suitable for cushioning and packaging;
  • Permanent deformation is low when the correct density and thickness are selected.

Note: The behaviour depends on density, layer thickness and the type of load (static vs. dynamic). If the load is very high, a higher density or multilayer solution may be recommended.

Where compression resistance matters most

— underlay and flooring systems;
— construction joints and expansion gaps;
— HVAC and vibration damping;
— packaging of heavy equipment;
— gaskets, seals and automotive parts.

How to minimise permanent deformation

— choose adequate thickness and density;
— avoid point loads on a very small area;
— allow the foam to recover after long-term compression;
— use crosslinked foam grades for higher mechanical loads.

Frequently asked questions

  • Does IXPE keep its shape better under pressure? Yes, crosslinking provides higher dimensional stability.
  • Can you advise suitable grades? Sure, share your application and load requirements.
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