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Home / Rubber Sheeting / Cork Rubber Sheeting / Nitrile / Neoprene Rubber Bonded Cork – TRANSFORMER GRADE per IS-4253 PART II 1988- ASTM F104

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Item Code: SM353

Nitrile / Neoprene Rubber Bonded Cork – TRANSFORMER GRADE per IS-4253 PART II 1988- ASTM F104

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

TRANSFORMA 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
values
fps units
test method
values
metric units
Hardness Shore-A (IRHD) ASTM D1415 65 to 75
Tensile Strength (MPA) ASTM F152 2.0 Min
Compressibility % @ 2.76 MPA ASTM F36 25-35%
Recovery % (Min) ASTM F36 80
Percentage Volume Change After Immersion
ASTM OIL NO. 1 (AT 110 DEG. C. 72 HOURS) ASTM F146 -5 TO + 10
ASTM OIL NO. 3 OR IRM 903 (AT 110 DEG. C. 72 HOURS) ASTM F146 -5 TO + 10
Oil resistance Excellent
ASTM FUEL A (AT AMBIENT TEMPRATURE. 22 HOURS) BS148 Transformer Oil, 15 days @ 90°C ASTM F146 0 TO + 10 ASTM F146 + 8
Seal ability of Gasket Materia ASTM F37 Zero Leak Rate (ML/H)
Flexibility When bent Around a 4 x Gasket Thickness DIA. Mandrel No Cracks The Gasket Material Shall Remain Flexible Down To–15°C ASTM F147
Maximum temperature can withstand 120°C
Material
Rubber Nitrile/Neoprene
Granulated Cork 0.5 / 1.0 MM
Colour Natural

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