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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 for arduous applications for transformer, automotive and industrial gaskets having excellent resistance to transformer oils and fuels with high resilience, flexibility and compression characteristics.

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

  • Material Profile (see below for exact specifications)
  • Thickness: 1.5mm to 6mm
  • 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

Technical Data

Stock Roll Sizes [m x m x mm]Surface FinishWeight [kg/M2]
1.5mm x 1000mm x 10m Nat 1.05
3mm x 1000mm x 10m Nat 2.10
5mm x 1000mm x 10m Nat 3.50
6mm x 1000mm x 10m Nat 4.20
Specifications CompoundTest MethodValues
FPS Units
Hardness Shore-A (IRHD): 65 to 75 ASTM D1415
Tensile Strength: 2.0 Min. ASTM F152
Compressibility % @ 2.76 MPA: 25-35% ASTM F36
Recovery % (Min): 80 ASTM F36
Percentage Volume Change After Immersion:
ASTM OIL NO. 1
(AT 110 DEG. C. 72 HOURS:
-5 TO + 10 ASTM F146
ASTM OIL NO. 3 OR IRM 903
(AT 110 DEG. C. 72 HOURS) :
-5 TO + 10 ASTM F146
ASTM FUEL A (AT AMBIENT TEMPRATURE. 22 HOURS)

BS148 Transformer Oil, 15 days @ 90°C:
0 TO + 10
+ 8
ASTM F146

ASTM F146
Seal ability of Gasket Material: Zero Leak Rate (ML/H) ASTM F37
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: 110 Deg. C.
Material:
Rubber: Nitrile/Neoprene
Granulated Cork: 0.5 / 1.0 MM
Colour: Natural

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