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Ceramic Fire-resistant Silicon Rubber (WCSR)

Ceramic Fire-resistant Silicon Rubber (WCSR)

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WCSR is an off-white solid silicone rubber, usually cross-linked with 0.8%-1.2% vulcanizing agent DCBP [2,4-Dichlorobenzoyl peroxide, 50%] at T >160 or with 0.8%-1.5% DHBP [ 2,5-Dimethyl-2,5-di(tert-butylperoxy) hexane, 45%-50%] at T >180. The cross-linked composite has excellent properties of fire-proof, flame retardant and low smoke. It can immediately convert to integral ceramic shield without melting or dripping to ensure circuit integrity in case of a fire.



Excellent ceramic ability, without melting or dripping.

Good which can use ordinary silicon rubber extrusion equipment.

Environment-friendly material, complied with ROHS.

Wide applicable range of temperature: -70℃~200℃.

Typical Properties

Property Test Method Unit Typical Value
9711 9710 5710 3710
Specific Gravity ISO 2781 g/cm3 1.42 1.42 1.42 1.45
Shore A Hardness ASTM D 2240 - 70±5 70±5 70±5 70±5
Tensile Strength   MPa ≥7.5 ≥7.0 ≥6.0 ≥5.5
Elongation at Break ASTM D 412 % ≥300 ≥250 ≥200 ≥180
Tear Strength ASTM D 624 kN/m ≥30 ≥25 ≥23 ≥21
Volume Resistivity IEC 60093 Ω·cm 2×1015 1×1015 5×1014 2×1014
Dielectric Strength IEC 60243 kV/mm 24 20 15 10
Dielectric Constant(50Hz) IEC 60247 δ 2.5 2.5 2.6 2.6
Dissipation Factor(50Hz) DIN EN 60247 tanδ 0.010 0.010 0.010 0.015
Smoke Toxicity GB/T 20285-2006 - ZA1 ZA1 ZA1 ZA1
Note: WCSR family mainly contains 9711, 9710, 5710, 3710. All data are obtained after press curing with 1.2% crosslinker 2,4- Dichlorobenzoyl peroxide, 50%. These figures are only intended as a guide and should not be used in preparing specifications.


As layer or inner sheath for wire and cable assuring circuit integrity according to BS 6387 CWZ


No short circuit occurred when the cables were burned, with no lamps went out.


Net weight: 25kg/carton, with a plastic bag inside.

WCSR It is recommended that they shall be stored in a dry and ventilated condition with no sunshine.

Safety information

According to the present state of our knowledge, WCSR contains neither toxic nor corrosive substances which would require special handling precautions. Therefore only the general industrial hygiene regulations apply.

Detailed safety information is contained in each Material Safety Data Sheet, which can be obtained from our sales offices.

Important Notice

Woer reserves all the rights to make any adjustments to the information contained at any time without notice

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