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PolyPaks are precision moulded, multi-purpose seals which combine an o-ring type rubber “O-Spring” with a conventional lip seal to provide a unique sealing device which is capable of sealing both vacuum, high and low pressure.

PolyPak seals are available in 3 styles; Standard Polypak, Deep Polypak and Type “B” Polypak.

The PolyPak seal offers a number of advantages over conventional u-cup seals:

The O-Spring stabilises the seal under extreme pressures, preventing seal lip distortion and rolling or twisting in the gland.
At low or high temperature extremes, the O-Spring maintains lip loading on both the I.D. and O.D. of the seal interface.
The PolyPak seal can be stretched or squeezed to accommodate oversized cylinder bores and undersized rods.


PolyPak seals are available in a wide range of materials which ensure the proper combination of abrasion, extrusion and temperature resistance and fluid compatibility in order to maintain high sealability and long service life.

Materials available:
Nitrile (NBR)
Fluorocarbon (FKM)
Hydrogenated Nitrile (HNBR)
Ethylene Propylene Diene Monomer (EPDM)
Carboxylated Nitrile (XNBR)


Call our Technical Sales department on 01234 832200 to discuss your PolyPak seal requirements.

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