USAMICA LLC has been in business 30 + years & Ability to produce ultra-thin (down to 0.001”), Scratch-free, dust-free V1-grade mica

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Mica Shields & Gaskets :

Mica Shields :

Mica Shields are widely used in visual liquid level gages to protect the glass surface from the corrosive effects of hot alkaline or acidic solutions. Mica shields are also commonly used in steam water applications to prevent etching and the weakening of the glass.

Mica Shield Selection: The quality of mica used in visual liquid level applications is determined by visual examination where the suitability is assessed on the basis of appearance. In this process of quality evaluation emphasis is placed on clarity, color, flatness, hardness, stains, visible inclusions and structural imperfections. As a result of this procedure, Mica is classified according to grades.

The most common mica grades used in liquid level gage applications are as follows:

V2 Green Mica Clear and slightly stained - navy grade quality, hard, of uniform color, may contain slight crystallographic discoloration, free from all vegetable and mineral stains, cracks, buckles and other similar defects and foreign inclusions except for a few tiny air inclusions in more than one-fourth of the useable area.
- Suitable for saturated steam service from 600 to 1500 PSIG
- Conforms to ASTM D351 specifications
- Government spec. number: MILG-18498A
- Thickness from .009 to .012 in single piece or in two pieces (the thinnest not less than .0045).

V4 Green Mica good stained - hard, of uniform color, may contain slight crystallographic discoloration, free from vegetable and mineral stains, cracks, buckless and other similar defects and foreign inclusions, except somewhat wavy but not rippled, may contain some air inclusions in not more than two-thirds of the usable area.
- Suitable for saturated steam service from 300 to 600 PSIG.
- Conforms to ASTM D351 specifications and the Government spec. number: MILG-18498A
- Thickness from .009 to .012 in single piece or in two pieces (the thinnest not less than .0045).

Mica Gaskets

Mica gaskets are sealing components made from mica sheet or mica with reinforcing materials (like stainless steel or tanged metal).

They're used in:
- Sealing flanges and joints in high-temperature or corrosive environments.
- Exhaust systems, boilers, turbochargers, and furnaces.
- Nuclear and aerospace industries where extreme reliability under heat and pressure is essential.

Mica Shields Properties Mica Gaskets Properties

Characteristics

- Excellent dielectric strength.
- Withstands temperatures up to ~1000°C depending on the type (muscovite vs. phlogopite).
- Chemically inert and resistant to water, acids, and oils.
- Non-toxic and asbestos-free.
- Maintains sealing performance at extreme temperatures.
- Resistant to thermal shock.

Mica Discs

Mica Disc offer a clean surface for EM applications, carbon filming and particle spraying, as well as for AFM applications. There are two types of mica: muscovite and phlogopite.

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Mica Sheets

Mica sheets are the foundation for manufacturing various mica parts used in thermal, electrical, and mechanical insulation applications.

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Fabricated Mica

When you need reliable and custom fabricated mica parts, USAMica Company is here to help. Our industry-leading fabrication capabilities consistently produce quality products on time and within budget.

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Crimped Mica Sheets

Crimped mica sheets are specialized materials made by layering and pressing mica, a naturally occurring mineral, into flexible or rigid sheets with a crimped (corrugated or textured) structure.

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Mica Shields & Gaskets

Mica Shields are widely used in visual liquid level gages to protect the glass surface from the corrosive effects of hot alkaline or acidic solutions.

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Mica Laminates

Mica Laminate is a sheet material/shaped material made from thin flakes of Mica that have been ground up & converted to pulp like paste, and pressed into sheet form.

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Phlogopite Mica

When applications call for very high temperature resistance, Phlogopite natural mica, commonly referred to as “Amber”, is an excellent choice.

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Standard Mica Shield Sizes (mm)

III

VII

VIII

XII

XIII

XIV

MICA SHIELD (TYPE A/B )
Length		Breadth
95	x	24
115	x	24
140	x	24
165	x	24
190	x	24
220	x	24
250	x	24
280	x	24
310	x	24
320	x	24
340	x	24
360	x	24
370	x	24
400	x	24
430	x	24

MICA SHIELD (TYPE A)
Length		Breadth
95	x	30
115	x	30
140	x	30
165	x	30
190	x	30
220	x	30
250	x	30
280	x	30
320	x	30
340	x	30
370	x	30
400	x	30
430	x	30
460	x	30
500	x	30

MICA SHIELD (TYPE B/H )
Length		Breadth
95	x	34
115	x	34
140	x	34
165	x	34
190	x	34
220	x	34
250	x	34
280	x	34
320	x	34
340	x	34
370	x	34
400	x	34
430	x	34
460	x	34
500	x	34

MICA SHIELD (TYPE TA-28)
Length		Breadth
133	x	47
158	x	47
183	x	47
208	x	47
238	x	47
268	x	47
298	x	47
338	x	47
358	x	47
378	x	47

Property	Muscovite Mica	Phlogopite Mica
Max Service Temperature	~500–600°C	~800–1000°C
Dielectric Strength	>20 kV/mm	~15–20 kV/mm
Thermal Conductivity	~0.2 W/m·K	~0.2–0.3 W/m·K
Density	~2.8 g/cm³	~2.7 g/cm³
Flexural Strength	~150 MPa	~120 MPa
Thickness Range	0.03 mm – 2 mm	0.1 mm – 2 mm
Transparency (Sight Glass)	Semi-transparent	Opaque
Chemical Resistance	Excellent	Excellent

Property	Value / Range
Max Service Temperature	Up to 1000°C (Phlogopite-based)
Continuous Operating Temp	~700–900°C
Compression Recovery	30–50% (depending on reinforcement)
Density	~1.6–2.2 g/cm³
Tensile Strength (reinforced)	~20–30 MPa
Chemical Resistance	Excellent (acids, oils, solvents)
Thickness Range	0.3 mm – 2 mm (common)
Fire Resistance	Yes (UL 94 V-0 for some grades)

USAMica has been in business for 30+ years. We are happy to supply your mica products and give you a custom mica solutions. Our mission is to become the global supplier of Mica Elements who provide quality products preferred by our customers.

410 Fleming Rd, Tekonsha, MI, 49092-0660 ZIP+4 code

+1(517)-767-3606

sales@usamica.com

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Industries

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Products

V1-Grade Mica Discs V1-Grade Mica Sheets Fabricated Mica Crimped Mica Sheets Mica Shields & Gaskets Mica Laminates Phlogopite Mica

Mica

What is Mica Types of Mica Uses of Mica