Nitrile / Neoprene Rubber Bonded Cork – TRANSFORMER GRADE per IS-4253 PART II 1988

SKU: SM353
Roll Size: 5m, 10m

This product is available for bespoke manufacturing, please choose an option below:

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SM353 is a Nitrile / Neoprene rubber bonded cork jointing sheet is a premium grade cork sheet for arduous applications for transformer, automotive and industrial gaskets that require excellent resistance to transformer oils and fuels with high resilience, flexibility and compression characteristics.

N.B. All Metroseal sheeting can be supplied plain or with self adhesive backed tape (SAB). Rubber Strip to bespoke sizes are available along with customised sheets/gaskets. Please email your enquiry details to sales@metroseal.co.uk.

TRANSFORMER GRADE  PER IS-4253 PART II 1988n – ASTM F104.

  • Material Profile (see below for exact specifications)
  • Thickness: 0.5mm to 50mm
  • Sheet Size: 1m wide in 10m rolls
  • Finish: Natural finish
  • Cutting: Standard press-tools

Other grades, colours and finishes are available – subject to minimum batch quantities.

Properties Test Method Unit Values
Hardness ASTM D2240 Shore A 60 -80
Density (Min) ASTM F 1315 Kg/M3 700
Tensile Strength Min: ASTM F 152 Mpa 1.72
Compressibility at 400 psi (min) ASTM F 36 % 25 -35
Recovery at 400 psi ( min) ASTM F 36 % 75
Flexibility ASTM F1 47 –
Original (F = 5) No Cracks No Cracks
Oven aged, 70h @100oC (F = 16) No Cracks
ASTM No1 Oil 70hr @ 100oC (F 16)
Volume change after immersion ASTM F 146
ASTM No1 Oil 70hr @ 100oC % -10 to +10
IRM 903 Oil 70hr @ 100oC % 0 to +20
 Fuel A, 22Hr @ RT % 0 to +15
Compression Set , Method A,  22h 70oC ( Max) % 40
Rubber Binder Neoprene/Nitrile
Cork Granular Size mm 0.5- 1
Colour: NATURAL

 

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