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1000°C ≥15 kV/mm
Mica flange gasket - precision industrial sealing gasket for electric motors, transformers, furnaces, and high-voltage switchgear
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◆ Industrial Sealing Gasket · Heat + Electrical

Mica Flange Gasket — Precision-Stamped Gaskets for High-Temp Industrial Sealing

500–1000°C ≥15 kV/mm Custom Shapes

Precision-engineered mica flange gaskets made from natural muscovite, phlogopite, or synthetic mica. Produced through careful raw material selection, splitting into thin sheets, and precision cutting and stamping to your exact dimensions. Breakdown voltage ≥15 kV/mm effectively insulates HV equipment. Continuous temperature 500-1000°C depending on grade. Strong resistance to acids, alkalis, organic solvents, and moisture. Balanced compression strength and flexibility for dynamic mechanical environments.

3 Grades
Muscovite / Phlogopite / Synthetic
≥15kV/mm
Breakdown Voltage
500–1000°C
Operating Temp
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Product Gallery

See Our Mica Flange Gaskets in Detail

From precision-stamped circular flange gaskets to custom shapes for transformers, furnaces, and engine bay sealing — every gasket is inspected for dimensional accuracy and edge finish.

Circular Circular mica flange gasket close-up - precision-stamped for standard pipe and flange sealing applications
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Custom Shapes Custom-shaped mica gaskets in varied sizes - cut and stamped to customer specifications
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Motor App Mica gasket application in electric motor housing - insulation and sealing between components
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Furnace Seal Mica gasket used as heat seal in industrial furnace door - minimizing heat loss and withstanding thermal radiation
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Exhaust Seal Automotive exhaust system mica flange gasket - thermal isolation between hot exhaust and vehicle frame
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◆ Production & Inspection Video · Upload /images/mica-flange-gasket-demo.mp4
Key Features

Six Properties That Define Our Mica Flange Gasket

Every gasket is precision-stamped from premium mica sheet and inspected for dimensional accuracy, breakdown voltage, and edge quality before delivery.

◆ 01

Outstanding Electrical Insulation

Breakdown voltage ≥15 kV/mm — effectively isolates current even in high-voltage environments. Essential for protecting electrical equipment, preventing short circuits, and ensuring reliable operation.

◆ 02

Exceptional Heat Resistance

Withstands continuous 500-1000°C depending on mica type. Short-term tolerance even higher — structural integrity maintained under extreme thermal stress in furnaces, kilns, and engine bays.

◆ 03

Strong Chemical Stability

Resistant to most acids, alkalis, and organic solvents — maintains integrity in humid and chemically aggressive environments. Chemical inertness ensures long-term durability without degradation or corrosion.

◆ 04

Balanced Mechanical Properties

Optimal balance of compression strength and flexibility — firmly fills gaps for effective sealing yet remains flexible enough to resist cracking under vibration or mechanical shock. Ideal for dynamic environments.

◆ 05

Precision Manufacturing

Produced through careful mica selection, thin-sheet splitting, cutting, and precision stamping. For high-performance applications, additional surface treatments and composite processing enhance specific properties.

◆ 06

Custom Shapes & Sizes

Circular, rectangular, oval, or fully custom geometries per your CAD drawing. Thickness from 0.15mm to 5mm. Inner/outer diameters, hole patterns, and edge finishes tailored to your flange or sealing application.

Material Options

Three Mica Grades + Custom Manufacturing

Choose the mica grade that matches your operating temperature and chemical environment. All grades use the same precision cutting and stamping processes — plus optional surface treatments for specialty applications.

Up to 500°C

Muscovite (White)

Natural white muscovite mica gasket. Moderate temperature range ideal for household appliances, low-voltage motors, and general electrical equipment. Economical choice with excellent dielectric insulation.

  • Ovens & microwaves
  • Electric heaters
  • Low-voltage motors
Up to 800°C

Phlogopite (Gold)

Natural gold phlogopite mica gasket. Superior high-temperature performance for industrial furnaces, boilers, automotive exhaust systems, and HV transformers. Premium grade with enhanced chemical resistance.

  • Industrial furnaces & boilers
  • Automotive exhaust sealing
  • HV transformers & switchgear
Up to 1000°C

Synthetic Mica

Lab-synthesized fluorophlogopite mica gasket. Extreme temperature tolerance up to 1000°C, ultra-high purity, superior chemical stability. For aerospace engines, critical HV applications, and specialty industrial sealing.

  • Aerospace engines
  • Critical HV equipment
  • Specialty industrial seals
5-Step Process

Precision Manufacturing

Raw mica selection → Splitting into thin sheets → Cutting to shape → Precision stamping → Optional surface treatment (for high-performance applications). Every gasket is QC-inspected for dimensional accuracy.

  • Mica selection & grading
  • Precision stamping & cutting
  • Surface & composite treatments
Technical Specifications

Mica Flange Gasket Material Comparison

Technical parameters of our three mica gasket grades. All batches tested per IEC 60371-2, IEC 60243-1, and UL 94 standards.

Mica Flange Gasket Technical Data
◆ Muscovite · Phlogopite · Synthetic Grades · Rev. 2025
◆ Certified
Property Sub-Item / Unit MuscoviteWhite PhlogopiteGold Test Method
Mica Content % ≈ 85 ≈ 85 IEC 60371-2
Binder Content % ≈ 15 ≈ 15 IEC 60371-2
Density g/cm³ 1.6 – 2.2 1.6 – 2.2 IEC 60371-2
Continuous Temp °C 500 700 —
Intermittent Temp °C 800 1000 —
Weight Loss @ 500°C % < 1 < 1 IEC 60371-2
Weight Loss @ 700°C % < 2 < 2 IEC 60371-2
Breakdown Voltage kV/mm ≥ 15 ≥ 15 IEC 60243-1
Insulation Resistance @ 23°C Ω·cm 10¹⁶ 10¹⁶ IEC 60243-1
Flame Rating — UL 94 V-0 UL 94 V-0 UL 94
Core Applications

Five Industries That Specify Our Mica Flange Gaskets

From HV switchgear insulation to automotive exhaust sealing — wherever high-temperature industrial sealing with electrical isolation is required.

Power Industry

Widely used for internal insulation and isolation in motors, transformers, and high-voltage switchgear. Placed between components as reliable insulation barriers — prevents current from flowing where it shouldn't, maintaining equipment safety and efficiency.

Industrial Furnaces & Heating Systems

Serves as high-temperature sealing elements in industrial furnaces, boilers, and piping systems. Minimizes heat loss, keeping thermal energy where needed. Withstands intense thermal radiation during equipment operation, improving overall system energy efficiency.

Automotive & Aerospace

Used in high-temperature areas around engines and exhaust systems. Provides reliable sealing and effective thermal insulation — protects nearby components from extreme heat, ensures critical part operation, enhances overall vehicle and aircraft safety and performance.

Household Appliances

In everyday appliances like ovens, microwaves, and electric heaters — mica gaskets serve as thermal insulation and electrical insulation components. Help retain heat where it's needed for cooking/heating, while protecting users from electric shock hazards.

Chemical Processing

In chemical reactors, pressure vessels, and specialty equipment exposed to acids, alkalis, organic solvents, and corrosive media. Chemical inertness ensures long-term sealing integrity without degradation — extends equipment service life in harsh industrial environments.

Our Heating Components Range

Explore Our Complete Heating Components Series

Beyond mica flange gaskets, our heating components range includes mica heating elements, heater plates, hair dryer elements, and electric heating films — engineered for every industrial and appliance application.

◆ 600°C · 1000W Hair dryer heating element - mica heating head with sandwich structure

Hair Dryer Heating Element

Mica hair dryer heating head with NiCr/FeCrAl resistance wire sandwich structure. 600°C max, >100MΩ insulation, ~90% thermal efficiency. Customizable shapes and power up to 1000W.

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◆ 3s Rapid Heat Electric heating film - innovative metal foil heating laminated with mica paper

Electric Heating Film

Innovative metal foil heating element laminated with mica paper. 3-second rapid heating, ±2°C uniformity, 200-600°C, 5W-3000W, >100,000hr service life. IP44 waterproof.

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◆ 6 Products Heating components range - complete series

Heating Components Hub

Explore our complete heating components range: Mica Plate Resistor, Heater Plate, Hair Dryer Heating Element, Flange Gasket, Heating Element, and Electric Heating Film. One-stop sourcing.

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Need Mica Flange Gaskets for Your Application?

Tell us your flange dimensions, operating temperature, voltage rating, chemical environment, and quantity — our engineering team responds within 24 hours with material recommendation, TDS, samples, and factory-direct pricing.

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