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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Downloads

ARMAFLEX
ARMAFLEX WJSPARMA_O WJ21 >

EPDM & NEOPRENE BLEND
BLACK CLOSED CELL EPDM NEOPRENE WJSP320 WJ21 >
Black Closed Cell Expanded EPDM-Neoprene Sponge WJSP320K WJ21 >
WJNEOSPCORD- WJSPC WJ21 >

EPDM SPONGE
Black Closed Cell EPDM Sponge Medium Sulphur Free WJSPA319 WJ21 >
Black Closed Cell EPDM Medium Sponge High Temp WJSPA318 WJ21 >
Black Closed Cell EPDM Sponge Medium WJSPA316 WJ21 >
Black Closed Cell Expanded EPDM Firm WJSP317 WJ21 >
Black Semi Open Cell Soft EPDM WJSPA314 WJ21 >
White Closed Cell EPDM sponge Medium WJSPA316W WJ21.pdf >

NATURAL OPEN CELL LABEL SPONGE
Natural Orange Sponge Various Densities WJ21 >

NEOPRENE SPONGE
Black Closed Cell Firm Neoprene WJSPA312 WJ21 >
Black Closed Cell Medium Neoprene Fire Rated WJSPA311FR WJ21 >
Black Closed Cell Neoprene Soft WJSPA309FR WJ21 >

NITRILE PVC
Black PVC Nitrile WJSPA325FR WJ21 >

SILICONE SPONGE
BF1000 Soft Silicone Low Smoke & Toxicity Sponge WJSPBF1000FR WJ21 >
Black Closed Cell Silicone Sponge WJSPSILB WJ21 >
HT800 Medium Silicone Low Smoke & Toxicity Sponge WJSPHT800FR WJ21 >
Silicone Sponge Rubber 16Lb WJSPSIL16LB WJ21 >
White Closed Cell Silicone Sponge -WJSPSILW WJ21 >
Silicone Sponge FDA WJ23 >

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.

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Disclaimer
Please note, failure to select the correct materials or products we supply (“the Products”) may result in damage to plant, equipment or property. In some instances, it may cause death or personal injury. We are not designers and do not give advice about design related matters concerning the Products. We can help and assist with the technical specifications for the Products. In specific applications, particularly where critical conditions exist, we will try to assist you within the limitations of the services that we offer. All information supplied by us is intended as technical co-operation outlining the specifications of the different Products which we supply. To the extent permitted in law, no warranty is given in respect of any information supplied by us. The customer must satisfy themselves as to the suitability of the Products for their intended application and use. The correct fitting of Products is the responsibility of the customer. Your statutory rights remain unaffected. Save in respect of death, personal injury or fraud, our entire liability to you, however arising from the supply of Products shall be limited to the £10M indemnity amount provided by our insurers.