Red steel paper gaskets, also known as insulating fiber gaskets, are industrial-grade insulation materials made from high-quality cotton and wood pulp base paper. The base material is impregnated with zinc chloride solution to gelatinize the fibers, followed by desalination and drying for structural stability.
This material offers exceptional oil resistance, electrical insulation, arc-quenching capability and strong mechanical strength comparable to aluminum—but with only half the weight.
With a temperature resistance of –40°C to 120°C and UL94 V-0 flame-retardant certification, red steel paper gaskets are widely used in transformers, motors, electrical cabinets, power tools and precision insulation components. The production process includes environmentally compliant burning treatments and meets RoHS requirements.
Technical Data
| Product Name | Red Steel Paper Gasket / Insulating Fiber Gasket |
| Material | Cotton & wood pulp chemical fiber base paper |
| Flame Rating | UL94 V-0 |
| Temperature Range | –40°C to 120°C |
| Oil Resistance | ASTM D471 compliant |
| Dielectric Strength | Meets IEC insulation standards |
| Arc Resistance | IEC 61621 compliant |
| Water Absorption | < 3% |
| Available Thickness | 0.2 mm – 5 mm (custom available) |
| RoHS Compliance | Yes |
| Processing | Cutting, stamping, CNC machining available |
Features
High Mechanical Strength
Strength comparable to aluminum
Excellent tensile strength and toughness
Durable for mechanical processing and structural insulation
Superior Electrical Insulation
Arc-quenching performance meets IEC 61621
Ideal for high-voltage electrical equipment
Stable dielectric properties in demanding environments
Excellent Oil Resistance
Meets ASTM D471 oil-resistance standard
Suitable for motors, transformers and lubrication environments
Flame Retardant (UL94 V-0)
Self-extinguishing under arc impact
Safe for environments requiring strict flame-retardant performance
Heat & Corrosion Resistance
Operates reliably from –40°C to 120°C
Resists humidity, acids, oils and industrial chemicals
Environmental Compliance
RoHS compliant
Eco-friendly production and combustion treatment process
Excellent Machinability
Supports cutting, drilling, punching, rolling, stamping
No delamination or cracking during processing
Applications
◆ Electrical & Power Equipment
Transformer slot insulation
Motor commutator insulation sheets
High-voltage device arc-resistant components
◆ Rail Transit
Train electrical cabinet insulation boards
Components meeting EN 45545 fire-safety standard
◆ Household Appliances
Microwave oven high-voltage capacitor insulation
Electric iron heating module supports
◆ Industrial & Mechanical Equipment
Oil-resistant gasket sheets
Structural insulating spacers
Components requiring lightweight strength
◆ Marine & Aerospace
Corrosion-resistant gasket materials
Lightweight high-insulation components
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