High-Precision Silicone Gasket

Product Specifications

Technical details and manufacturing context for High-Precision Silicone Gasket

Definition

A precision-engineered sealing component manufactured from liquid silicone rubber (LSR) via injection molding. It is designed to create a reliable, durable, and often custom-shaped barrier against environmental factors such as dust, moisture, and chemicals in industrial assemblies. These gaskets are critical for maintaining the integrity and longevity of sensitive equipment in sectors like electronics, automotive, and medical device manufacturing. The gasket is available in a range of hardness values (40–70 Shore A), thicknesses (1.5–12 mm), and outer diameters (50–500 mm), with black or custom colors. It operates at pressures from 1.0 to 1.6 MPa and temperatures from -40 to 200 °C. Mechanical properties include tensile strength of 6–10 MPa, elongation at break of 300–600%, tear strength of 20–40 kN/m, and compression set of ≤20% (22 h at 175 °C, method B). Electrical insulation is supported by dielectric strength of 15–25 kV/mm, and water absorption is ≤0.5%. The gasket meets UL94 V-0 flame rating. Weight ranges from 0.05 to 2.5 kg depending on size and thickness. Materials include LSR, platinum-cure silicone, and fumed silica reinforcement. These values are reference ranges; verify model-specific specifications with the manufacturer.

Working Principle

The gasket forms a compressible, elastomeric seal between two mating surfaces. When compressed, the silicone deforms elastically, filling microscopic surface imperfections to create a barrier against fluids, gases, dust, and other contaminants. The material's low compression set ensures long-term sealing under sustained load. The gasket's hardness and thickness influence its conformability and required clamping force. Proper installation involves uniform compression to avoid over-stressing the material. Over time, exposure to extreme temperatures or chemicals may degrade the silicone, to loss of elasticity and potential leakage. Regular inspection for cracks, permanent deformation, or hardening is recommended. Replacement is necessary when the gasket no longer maintains a seal within the specified operating conditions.

Common Materials

Liquid Silicone Rubber (LSR), Platinum-Cure Silicone, Fumed Silica (reinforcement)

Technical Parameters

Parameter	Typical range	Notes & selection driver
Durometer HardnessRequired	40–70 Shore A	Material firmness (e.g., 30A soft, 70A firm)ASTM D2240
ThicknessRequired	1.5–12 mm	Nominal compressed thicknessISO 3302-1
Outer DiameterRequired	50–500 mm	Maximum external dimensionISO 3302-1
Color	Black or custom n/a	Standard or custom pigment
Flame Rating	UL94 V-0 n/a	e.g., UL94 V-0, HBUL 94
Operating Temperature	-40–200 °C	Silicone rated for continuous useASTM D2000
Tensile Strength	6–10 MPa	Minimum for industrial gasketsASTM D412
Elongation at Break	300–600 %	Higher elongation improves conformabilityASTM D412
Tear Strength	20–40 kN/m	Resists tearing during installationASTM D624
Compression Set	≤20 %	At 22 h/175°C, method BASTM D395
Dielectric Strength	15–25 kV/mm	For electrical insulation applicationsASTM D149
Water Absorption	≤0.5 %	Low water uptake for dimensional stabilityASTM D570
Weight	0.05–2.5 kg	Depends on size and thickness

Ranges are indicative industry figures for RFQ preparation, not a supplier commitment. Confirm every value and standard with the legal manufacturer before ordering.

Components / BOM

Gasket Body
Primary sealing element

Material: LSR Compound
Adhesive Backing Optional Part
Optional mounting layer

Material: Acrylic or Silicone Adhesive
Release Liner Optional Part
Protects adhesive before use

Material: Polycoated Paper

Industry Taxonomies & Aliases

Commonly used trade names and technical identifiers for High-Precision Silicone Gasket.

Manufacturers of High-Precision Silicone Gasket

Manufacturer profiles associated with High-Precision Silicone Gasket.

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Frequently Asked Questions

What materials are used in this gasket?

The gasket is manufactured from liquid silicone rubber (LSR), with platinum-cure silicone and fumed silica as reinforcement. These materials provide elasticity, durability, and resistance to environmental factors.

What are the operating temperature and pressure ranges?

The gasket is rated for continuous use from -40°C to 200°C. The operating pressure range is 1.0 to 1.6 MPa.

What standards are referenced for verification?

Standards include ASTM D2240 for hardness, ISO 3302-1 for dimensions, UL 94 for flame rating, ASTM D2000 for temperature, ASTM D412 for tensile and elongation, ASTM D624 for tear, ASTM D395 for compression set, ASTM D149 for dielectric strength, and ASTM D570 for water absorption.

How should I verify the gasket's suitability for my application?

Confirm the required dimensions, hardness, and performance parameters with the legal manufacturer or supplier. The listed values are reference ranges; actual product specifications must be verified for your specific model and application.

Data Basis

Editorial classification, named public sources where available, and source-reviewed manufacturer records.

Preliminary Technical Classification

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pressure:	Up to 150 psi (static), 100 psi (dynamic)
temperature:	-60°C to +230°C
compression set:	≤25% after 22 hours at 175°C
chemical resistance:	Resistant to most oils, fuels, and mild chemicals

Product Specifications

Industry Taxonomies & Aliases

Industrial Ecosystem & Supply Chain Structure

Application Fit & Sizing Matrix

Reliability & Engineering Risk Analysis

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