Leading China manufacturer of high-quality Silicone Sponge Cord. Features: density 0.38-1.0g/cm³, hardness 5-20 Shore A, temp range -60°C to 280°C. Ideal for kiln, appliance & electrical seals. Get OEM/ODM solutions.
Silicone Sponge Cord: The Ultimate Sealing Solution for Extreme Environments
In the realm of industrial sealing and insulation, materials are constantly challenged by heat, cold, pressure, and corrosive elements.
Silicone Sponge Cord stands out as a premier engineered material designed to not only meet these challenges but exceed expectations. As a specialized China manufacturer and supplier,
we utilize advanced foaming and curing technologies to produce cords that offer unparalleled performance consistency and reliability.
This article delves into the specifics of what makes our Silicone Sponge Cord an indispensable component across countless industries.
Silicone Sponge Cord is fabricated through a precise process where a controlled foaming agent is compounded into raw silicone polymer.
Subsequent high-temperature vulcanization triggers a reaction that releases gases, forming a vast network of uniform, microscopic closed cells throughout the material.
This unique structure is the origin of its defining characteristics: lightweight yet durable, highly compressible with strong resilience, and possessing excellent thermal and acoustic insulation properties.
Unlike solid silicone rubber or open-cell foam, our closed-cell sponge cord effectively resists the passage of air, water, and dust, making it an exceptional sealing agent.
Its non-toxic, odorless, and environmentally friendly composition aligns with stringent global safety and environmental standards.
Furthermore, the material boasts excellent non-stick properties and breathability, preventing adhesion to surfaces and allowing for pressure equalization in sealed systems.
Core to its value proposition is a remarkable temperature range from -60°C to 280°C. This stability ensures the material remains flexible and effective in deep-freeze conditions while maintaining structural integrity and sealing force at continuous high temperatures where organic rubbers would fail.
Combined with inherent resistance to aging, ozone, UV light, and most acids and alkalis, Silicone Sponge Cord guarantees a long, maintenance-free service life, reducing total cost of ownership.
Details and Comparison
When selecting a sealing material, understanding the technical specifications and how they compare to alternatives is crucial.
The Key Features of Silicone Sponge Cord:
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Unmatched Temperature Resistance: Our high-quality cords can withstand continuous operation at 250°C-280°C without hardening, cracking, or degrading. Low-temperature flexibility down to -50°C/-60°C ensures performance in cryogenic or outdoor winter environments.
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Superior Elasticity & Compression Resistance: The closed-cell structure provides outstanding compression set resistance. After prolonged compression, it rebounds to nearly its original shape, maintaining a permanent and reliable seal—a critical advantage over inferior foams that take a permanent set.
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Consistent Quality: We ensure tight surface tolerances and uniform foam density across every batch, guaranteeing predictable performance, ease of installation, and a perfect seal every time.
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Versatile Performance: It is electrically insulating, flame retardant, and offers excellent sound damping.
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Its resistance to moisture, weathering, and a wide range of chemicals makes it suitable for harsh indoor and outdoor applications.
Parameter Table (Typical Specifications):
| Property | Standard Value | Metric / Test Method |
|---|---|---|
| Density Range | 0.38 – 1.0 g/cm³ | Adjustable per requirement |
| Hardness | 5 – 20 Shore A | ASTM D2240 |
| Continuous Service Temp | -60°C to +280°C | — |
| Compression Set | ≤ 10% (22 hrs @ 150°C) | ASTM D395 |
| Tensile Strength | ≥ 0.8 MPa | ASTM D412 |
| Elongation at Break | ≥ 150% | ASTM D412 |
| Flammability | UL94-HB | — |
| Color | Red, Black, Gray, Custom | — |
Silicone Sponge Cord Size & Specification
| Cord Diameter (mm) | Tolerance (mm) | Standard Length (m/roll) |
|---|---|---|
| Φ 3 | ±0.2 | 50 / 100 |
| Φ 5 | ±0.3 | 50 / 100 |
| Φ 6 | ±0.3 | 50 / 100 |
| Φ 8 | ±0.4 | 50 |
| Φ 10 | ±0.5 | 50 |
| Φ 12 | ±0.5 | 50 |
| Φ 15 | ±0.5 | 50 |
| Φ 20 | ±0.5 | 50 |
| Custom diameters and profiles are available upon request. |
Comparison with Alternative Materials:
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vs. Solid Silicone Cord: While solid silicone shares high-temperature resistance, the sponge cord is lighter, more compressible (requiring lower closure force), and provides better thermal/acoustic insulation. It is the preferred choice for sealing uneven or flexible surfaces.
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vs. EPDM or CR Foam: These organic foams degrade quickly at high temperatures and have poor ozone/weather resistance. Silicone Sponge Cord offers a far wider temperature range and superior long-term aging performance.
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vs. Open-Cell Sponge: Open-cell materials can absorb water and fluids, leading to potential swelling, mildew, and loss of function. Our closed-cell silicone sponge is inherently waterproof and fluid-resistant.
Applications: The combination of these features makes our cord ideal for:
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Roller Kiln Seals: Withstanding intense heat in ceramic and glass manufacturing.
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Industrial & Ship Seals: Resisting saltwater corrosion and weather extremes.
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Dust Removal & Environmental Equipment: Sealing filters and housings in abrasive, chemical-laden atmospheres.
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Electrical Cabinet Seals: Providing EMI/RFI shielding gaskets with excellent insulation.
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Household Appliance Seals: Used in ovens, heaters, and other high-temperature appliances for safe, durable sealing.
As a leading Silicone Sponge Cord factory in China, we combine stringent quality control with advanced manufacturing capabilities to deliver products that empower your designs to perform reliably in the most demanding conditions.
Contact us for tailored solutions that meet your precise application needs.