Nebar - Cork - elastomer Jointings—Technical Details
This table shows the 10 standard grades of Nebar together with a range of standard physical properties and supply details

Nebar Grade

Type

Base Elastomer

ASTM D1415

Hardness IRHD

ASTM F152 Minimum Tensile Strength Mpa

ASTM F36

Low Temperature Flexibility C (see note 3)

Maximum Operating Temp in Fluids C

Fluid Resistance Volume Swells ASTM F146 (%)

Sheet Size (mm)

Supply Details

Percentage Compressibility @  2.8 N/mm2

Minimum Percentage Recovery

ASTM 1 72 Hours @ 100C

ASTM3 72 Hours @ 100C

Fuel A 22 Hours @ Ambient Temperature

BS148 Transformer Oil 14 Days @ 90C

Standard Thicknesses (mm)

Yellow

Premium Nitrile

Nitrile + SBR

60 75

1.72

20 30

75

-20

110

-5 to + 15

+5 to +20

+5 to +15

+1

1200 x 1000

0.75, 1.00, 1.50, 3.00

Black

High Performance Electrical

Nitrile + Polychloroprene

65 80

2.45

15 25

85

-15

110

-2.7

+10.5

+1

+1.2

1200 x 1000

1800 x 1000

1200 x 1200

2.50

3.00

5.00

Red

High Pressure

Polychloroprene

70 85

2.35

10 30

80

-30

110

-5 to +5

+10 to +30

0 to +10

+10

1200 x 1000

1200 x 1200

0.75

1.5, 2.5, 3.00, 6.00, 6.40, 9.50, 22.00

Brown

General Purpose

<3mm Nitrile + SBR >3mm Polychloroprene + Nitrile

65 85

1.75

15 30

75

-20

110

-3 to +10

0 to +30

-5 to +15

+8 to +25

1200 x 1200

900 x 9000

0.75, 1.00, 1.50, 2.00, 2.50, 3.00, 4.00, 5.00, 6.00, 6.40

0.75, 1.50, 2.00, 3.00, 5.00

White

Premium Neoprene Electrical

Polychloroprene + Nitrile

65 85

1.75

20 30

80

-30

105

-5 to +10

+10 to +30

0 to +10

+10

1200 x 1200

0.75, 1.50, 2.00, 3.00, 4.00, 5.00, 6.00, 6.40, 8.00, 9.50

Purple

Nitrile Electrical

Nitrile + SBR

60 80

2

15 25

75

-20

120

-5 to +15

+5 to +20

+5 to +15

+1 to +10

1200 x 900

1270 x 1014

1.50, 3.00, 4.00, 5.00, 6.00, 6.40

1.50, 5.00

Orange

Neoprene Electrical

Polychloroprene + Nitrile + SBR

65 - 80

>2

20 35

75

-30

110

-5 to +10

0 to +30

0 to +15

+5 to +15

1200 x 1200

1.50, 2.00, 2.50, 3.00, 5.00, 6.00, 9.50

Grey

Premium Nitrile Electrical

Nitrile

70 75

2.45

20 30

85

-25

110

-2 to +10

-2 to +15

-2 to +10

+2.4

1200 x 900

1.50, 3.00, 5.00, 6.00

Blue

Unleaded Services

Nitrile

60 75

1.75

25 40

75

-5

115

-5 to +5

-2 to +15

-2 to +10

+0.8

1200 x 1000

1200 x 1200

2.00

3.00, 8.00

Green

Sponge

Polychloroprene

30 45

0.53

35 50*

75

-30

100

-10 to +10

+15 to +50

0 to +25

+15

1200 x 1000

3.00, 5.00, 6.4

1. All grades flexible at ambient temperature when placed around a mandrel of diameter equal to three times its thickness.
2. Low Temperature flexibility shown is the temperature at which material remains flexible when placed around a mandrel of diameter equal to six times its thickness.
3. Refer to the product information sheets for specification compliance.
*. Compressibility at 0.7N/mm2