Sponge Rubber

William Johnston & Company Limited support a variety of industrial applications throughout the UK with sponge rubbers in sheets, pads, strips in various widths, lengths and thicknesses in plain or with a self-adhesive backing options. The base materials are open or closed cell neoprene, silicone, EPDM and nitrile in various densities as described below.


DESCRIPTION

OPEN OR CLOSED

MIN TEMP °C

MAX TEMP °C

DENSITY
Kg/M³

FIRE RESISTANCE

WATER ABSORPTION %

ELONGATION
%

TENSILE STRENGTH MINIMUM PSI

NEOPRENE/EPDM

CLOSED

-56

93

112 (+/- 30)

Y

5

120

65

EPDM

CLOSED

-40

80

120 (+/- 20)

N

5

180

70

PVC/NITRILE

CLOSED

-50

116

75 (+/- 15)

Y

0.90

100

50

NBR SUPER-SOFT

CLOSED

-40

105

80 (+/- 10)

Y

5

180

40

SILIICONE

CLOSED

-60

200

200 (+/- 50)

Y

<5

200

130

NATURAL (ORANGE)
VARIOUS GRADES

OPEN

-40

100

130 – 270

N

98%

150

GRADE
DEPENDANT

Closed Cell Sponge
We offer Closed Cell Sponge in Neoprene, EPDM and Neoprene/EPDM blends. Also, our super-soft variety of Nitrile sponge which is ideal for gasketing and sealing applications that require a very soft, compressible material. These sponges are extremely impermeable to water, and good choices for shock absorption, weather sealing and thermal barriers. Available in Soft, Medium, Medium-firm, Firm and extra-firm densities

Silicone Sponge
Silicone Sponges are excellent materials for gasketing and padding applications that require a soft, compressible material. The closed cells of these sponges prevent water absorption. These materials also provide the ozone, weather and UV resistance typical of silicone. Available in a range of densities, colour, sheet, extruded profile and with or without self-adhesive backing.

Open Cell Sponge
Open Cell Sponges are gasketing and padding materials composed of connected cells that allow air or gas to pass through when compressed. These sponges offer good compression set characteristics, and typically rebound faster than closed cell sponges. Available in Soft to Medium densities. Can be class O fire rated. Cryogenic insulation options are also available. Used for wiping on adhesive labels and as foam rollers. If you have an application issue please talk to us.

Density

Density continues to be one of the most misunderstood properties of foams. Some people mentally relate density to the firmness of foams, and that relationship is totally incorrect.  Density is independent of firmness. Foams with an extremely wide range of hardness can be made at an extremely wide range of densities.

Conversion
Our factory employs various techniques to offer sheets, pads, strip material in various widths, lengths and thicknesses in plain or self-adhesive backed options. Please contact our sales team for further details.

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Contact William Johnston & Company Limited

For more information about our Sponge Rubber products that are available world wide, contact us on +44 (0)141 620 1666, Email us or simply complete our online Enquiry Form.

Failure to select the correct materials or products can result in damage to plant and equipment and personal injury. In specific applications, particularly where critical conditions exist, we suggest you contact us and we will consider with you the most suitable material or product. However, information supplied by William Johnston & Company Limited is intended only as technical co-operation and as a guide to the various uses of different products. No warranty is given in respect of information or recommendations by William Johnston & Company Limited which are only given for guidance and without any guarantee. The customer must satisfy themselves on the suitability of the material or product for the intended purpose. The correct fitting of products is the responsibility of the customer.

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