Gaskets and Sheet Jointings

Nebar® Yellow

Premium quality, nitrile based cork-elastomer jointing that meets the requirements of specification BS F 66.

Previously designated Nebar® A/CT.

Recommended maximum system pressure is 0.5Mpa/5bar. May be used for higher pressures in consultation with James Walker Technical Support Team.

Prime features

  • Resists a wide range of fluid media.
  • +110°C maximum operating temperature in liquids.
  • Retains flexibility down to -20°C.
  • Easy to cut, handle and install.


  • Conforms to BS F 66.

Fluid compatibilities
Suitable for use with air, water, alcohols, fuel and diesel oils, mineral and synthetic lubricating oils, mineral hydraulic fluids, and water/glycol, plus ASTM oil 1, IRM903 oil, ASTM Fuel A, BS148 Transformer Oil.

Physical properties
(Tested to ASTM F104 procedures)
Hardness, IRHD:  60 to 75  (ASTM D1415)
Tensile strength, MPa minimum:  1.72   (ASTM DF152B)
Compressibility @ 2.8N/mm², % :  20 to 30  (ASTM F36B)
Recovery, minimum %:  75  (ASTM F36B)
Fluid resistance, % volume change in:
ASTM Oil No 1, 72h @ 100°C:  -5 to +15  (ASTM F146)
IRM903, 72h @ 100°C:  +5 to +20  (ASTM F146)
ASTM Fuel A, 22h @ ambient:  +5 to +15  (ASTM F146)
BS148 Transformer Oil, 14 days @ 90°C:  +1.0  (ASTM F146)

How supplied
Precision cut gaskets to any shape, size and quantity. In sheets 1.2m x 1.0m with a split surface finish. Thicknesses 0.75mm, 1mm, 1.5mm, 3mm.

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