Mica Tubes and Fire-Resistant Sleeves

At SteinMetal, we specialize in supplying mica tubes made from phlogopite and muscovite, known for their excellent thermal resistance and dielectric properties. Our tubes provide electrical and thermal insulation solutions for industrial applications requiring high reliability and performance. Additionally, our fire-resistant sleeves —made from fiberglass/Kevlar® with silicone coating— protect hoses, cables, and pipes against continuous temperatures up to 900 °C and molten metal splashes up to 1650 °C, complying with ISO 15541, EN 45545-2, and NFPA 70 standards.

Innovative solutions with internationally certified quality.



Mica Tubes
Mica Tubes

Thermal and electrical insulation for extreme industrial conditions.

Fire-Resistant Sleeves
Fire-Resistant Sleeves

Thermal and mechanical protection for cables, hoses, and pipes.

Tailor-made mica tubes
Tailor-made mica tubes

Mica tubes with diameters from 10 mm and lengths up to 1200 mm.

High Durability
High Durability

Resistant to chemicals, abrasion, and extreme temperatures.

Ventajas y Aplicaciones

Advantages Applications
Superior Electrical Insulation: Ideal for high-voltage applications, providing an effective barrier against discharges. Motor and Generator Manufacturing: Insulation in coils and electrical components.
Exceptional Thermal Resistance: Withstand extreme temperatures, suitable for demanding industrial environments. Transformers and High Voltage Equipment: Insulators for high-voltage components.
High Mechanical Strength: Offer durability and structural stability under mechanical stress. Electric Arc Furnaces and Foundries: Protect structural elements exposed to high temperatures.
Chemical Compatibility: Resistant to most chemical agents, ensuring long service life. High-Power Appliances: Used in electric resistors and components requiring thermal and electrical insulation.
Custom Manufacturing: Available in diameters from 10 mm and lengths up to 1200 mm. Renewable Energy Systems: Ensure insulation in wind turbines and solar systems.
Extreme Thermal Protection: Fire sleeves for radiant heat and direct contact up to 900 °C. Foundries and Steel Mills: Sleeves protect hydraulic hoses and thermocouple cables in arc furnaces and ladles.
Spark and Splash Resistance: Sleeves withstand up to 1650 °C instantly. Aluminum and Non-Ferrous: Protect pneumatic lines and power cables in reverberatory furnaces and ingot molds.
Maintenance Savings: +300% service life for hydraulic hoses. Glass and Ceramics: Insulate compressed air pipes and PLC cables in melting furnaces and firing tunnels.
Quick Installation: Slip-on design for sleeves, custom cut on-site. Automotive and EV: Protect robot cables and coolant flexibles in MIG welding and paint ovens.
Chemical and Mechanical Durability: Sleeves resistant to oils, coolants, and abrasion. Petrochemical and Energy: Insulate fuel-oil lines and instrumentation cables in turbines and boilers.

Dimensions and Thicknesses Available

To ensure a perfect fit and maximum heat dissipation, we supply fire-resistant sleeves with internal diameters from 13 mm (½”) to 200 mm (8”) and three wall thicknesses:

Internal Diameter Standard Sleeve (3.2 mm) Heavy-Duty Sleeve (5.6 mm) Ultra Sleeve (7.2 mm)
13 - 25 mm (½” - 1”)
32 - 65 mm (1¼” - 2½”)
75 - 125 mm (3” - 5”)
150 - 200 mm (6” - 8”)

Lengths: rolls of 10 m, 15 m, and 20 m (other lengths available on special order). Standard color: oxide red; special colors available for orders ≥ 100 m.

Product Gallery

Mica Tubes
Fire-Resistant Sleeves
Tailor-made mica tubes
High Durability