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Open-cell Polyether PU

Open cell foams allow air to circulate internally through their structure; they have a high degree of compressibility and have a fast recovery when the compressive force is released. These properties make this type of foam ideal for applications where the loading is repetitive or likely to distort and provide a greater resistance to compression set.

Polyether foam is one member of the open cell polyurethane family, along with its closest comparator Polyester. Although these are very similar foams, they do have different performance characteristics that determine the applications they are suited to.

We also supply a good range of open cell polyether reconstituted (Chip) foams. These are made from the off cuts and block trimmings remaining after the open cell blocks of foam have been manufactured and processed. This prime material is coated with a binding agent and placed in a mould where it is re-bonded. This process creates high-density blocks that have excellent durability and resilience. 

Please note that reticulated foam is also a polyether foam type and further details of our stock is given in the specialist foam section.

Open cell Polyether PU Block Foam

How is it supplied?

Supplied in block form and, depending on the grade chosen, our stocks of open cell polyether blocks range from 2m to 2.5m in length, 1 to 2.03m in height, 175 to 1260mm in thickness and with densities ranging between 14 to 34kg/m3.

Our reconstituted foam stock can be procured at densities ranging between 60kg/m3 (4 lb) to 220kg/m3 (14 lb).

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Polyether foams when compared to polyester foams of the same density can be found to have courser, less even cell structures. Its typical characteristics include low thermal conductivity, good water resistance and resistance to mildews, fungicides, biocides and oils. It has a high compressibility and cushioning performance being soft, yet has a high tear strength and rebound quality.

This light weight, flexible foam also has good energy absorption characteristics along with sound absorption and vibration dampening characteristics making it a good insulator.

Expedition CMSI Gold_Blk drilled core closeup


These block foams are easily converted and are suitable for slitting and die cutting. They can also be CNC cut as required.

Common uses – Compression strips, packaging, case inserts, acoustic insulation, seals, gaskets, underlay and pipe lagging. Denser grades are used for cushioning.