Phlogopite Mica Gasket
Aluminosilicate + Silicone BinderMica gaskets have a high temperature and chemical resistance. They are used in the automotive industry, in gas turbines, heat exchangers and industrial burners. Mica gasket is made from high-grade phlogopite mica paper impregnated with a silicone binder. Phlogopite mica (aluminosilicate of mineral origin) gives the gasket its thermal characteristics and outstanding resistance to solvents, acids and mineral oils.
Three components decide the performance of the finished gasket. Understanding each one tells you why mica gasket works in joints where other sealing materials fail.
Phlogopite Mica Paper
An aluminosilicate of mineral origin. Provides the thermal characteristics and the outstanding resistance to solvents, acids and mineral oils.
Silicone Binder
Impregnates the mica paper and holds the layers together. Gives the finished gasket its mechanical strength and its flexibility at temperature.
High-Grade Mica Paper
Specially selected and processed to give a uniform, dense sheet. High-grade paper is what separates a long-life gasket from a short-life one.
Mica gasket is supplied in two standard formats — sheets and rolls. The format you choose depends on the finished part size, the production volume and the thickness you need.
Best for large gaskets, thick sections and shaped parts that need the higher thickness range.
Best for continuous production, slitting into strips and making many small gaskets from the same material in one run.
Customized strips or punched parts on request. Send us the outer diameter, inner diameter, bolt circle, thickness, material grade and quantity, and we will confirm the achievable tolerance and price before quoting.
The phlogopite mineral and the silicone binder work together to deliver a combination that most sealing materials cannot match — high temperature resistance and chemical resistance in the same product.
High temperature resistance
The phlogopite mineral provides thermal stability across a wide continuous operating range — the base property that makes the gasket suitable for exhaust, turbine and burner service.
Outstanding chemical resistance
Resists solvents, acids and mineral oils — the same properties that destroy conventional fibre or rubber gaskets. This is why mica gasket is the standard choice where the joint sees chemical attack.
Combined resistance in one material
High temperature and chemical attack often come together — exhaust gas, burner flue gas, turbine hot gas. Mica gasket handles both at the same time, which most sealing materials cannot do.
Uniform, dense sheet structure
High-grade mica paper and controlled silicone impregnation give a uniform sheet that cuts cleanly, punches accurately and seals reliably across the whole gasket face.
Two standard formats for any production scale
Sheets from 0.1 to 3.0 mm thickness for large parts and thick sections; rolls from 0.1 to 0.25 mm thickness in 500 or 1000 mm width for continuous production and slitting.
Custom strips and punched parts
Produced to drawing — send us the finished part geometry and we will match the sheet thickness and the cut or punch geometry to your production process.
Mica gasket is used in the four industries below — all of them share the same requirement: a joint that must resist high temperature and chemical attack at the same time.
Automotive Industry
Exhaust manifold joints, EGR system flanges, turbocharger connections and other under-hood joints that see continuous high temperature and exhaust gas.
Gas Turbines
Combustor and exhaust section flanges, hot gas path joints and turbine casing seals where the gasket must survive continuous high temperature and combustion products.
Heat Exchangers
Shell and tube covers, process fluid manifolds and hot-side joints where the gasket must resist both the process temperature and the chemical attack of the medium.
Industrial Burners
Burner mounting flanges, combustion chamber joints and flue connections where the gasket must resist flame-side temperature and combustion by-products.
What is a mica gasket used for?
Mica gaskets are used as high-temperature and chemically-resistant sealing elements in the automotive industry (exhaust and manifold joints), gas turbines, heat exchangers and industrial burners. They are chosen wherever the joint must resist high temperature and chemical attack from solvents, acids and mineral oils at the same time — conditions that would destroy a conventional fibre or rubber gasket.
What is a mica gasket made of?
Mica gaskets are made from high-grade phlogopite mica paper impregnated with a silicone binder. Phlogopite is an aluminosilicate of mineral origin — the mineral provides the thermal characteristics and the outstanding resistance to solvents, acids and mineral oils. The silicone binder holds the mica paper together and gives the finished gasket its mechanical strength and flexibility.
What sizes are available?
Two standard forms are produced. Sheets: thickness 0.1–3.0 mm, width 1000 mm, length up to 2400 mm. Rolls: thickness 0.1–0.25 mm, width 500 mm or 1000 mm, length up to 300 m. Custom strips and punched gaskets are made to drawing on request — send us the outer diameter, inner diameter, bolt circle, thickness and quantity.
What temperature and chemicals can the mica gasket resist?
Phlogopite mica gives the gasket its high thermal resistance, and the same mineral delivers outstanding resistance to solvents, acids and mineral oils. This combination is what makes mica gasket the standard choice for gas turbine exhausts, industrial burner flanges and automotive exhaust joints, where the gasket sees both heat and chemical attack at the same time.
Can I get a custom shape or punched gasket?
Yes. Alongside the standard sheets and rolls we produce custom strips and punched parts to drawing. Send the required outer diameter, inner diameter, bolt circle, thickness, material grade and quantity, and we will confirm the achievable tolerance and price before quoting.
Which is better for my application — sheet or roll?
Sheets (0.1–3.0 mm thickness) are used for cutting large or thick gaskets, for making shaped parts and for applications that need the higher thickness range. Rolls (0.1–0.25 mm thickness, 500 or 1000 mm width, up to 300 m length) are used for continuous production, for slitting into strips and for making many small gaskets from the same material in a single run. Send us the finished gasket dimensions and we will recommend the most economical format.
Tell us the industry (automotive, gas turbine, heat exchanger or industrial burner), the continuous operating temperature, the chemical environment, the thickness you need and the quantity. If you are ordering custom strips or punched parts, send the drawing with the outer diameter, inner diameter, bolt circle and tolerance. If you are replacing an existing gasket, send us the current part number and we will match it.
