Silicone Rubber Sheet

Silicone rubber materials have become a critical component in modern engineering and manufacturing due to their stability, safety, and adaptability in extreme environments. Among them, Silicone Rubber Sheet SP stands out as a high-performance elastomer designed for demanding industrial applications where temperature resistance, electrical insulation, and chemical stability are essential.

This article provides a structured overview of its material characteristics, technical performance, and typical use cases across multiple industries.

Material Overview

Silicone Rubber Sheet SP is manufactured using high-quality silicone elastomer compounds designed to meet strict environmental and safety standards, including ROHS compliance. This ensures that the material is environmentally friendly, non-toxic, and safe for use in sensitive applications such as food processing and medical environments.

Basic Characteristics:

• Material: Silicone rubber

• Color: Cream / Black

• Temperature Range: -40°C to 200°C (up to 220°C short-term)

• Structure: Soft elastomer sheet

• Compliance: ROHS environmental standard

The material maintains stable physical performance even under continuous thermal cycling.

Key Performance Features

Silicone Rubber Sheet SP is engineered to deliver consistent performance in harsh operating conditions.

1. Wide Temperature Resistance

One of its most important advantages is its ability to operate under extreme temperature variations.

• Low temperature resistance: -40°C

• High temperature resistance: up to 200°C continuous use

• Short-term peak resistance: up to 220°C

This makes it suitable for both cold storage systems and high-temperature industrial environments.

2. Excellent Electrical Insulation

The material exhibits strong dielectric properties, making it ideal for electrical and electronic applications.

• Breakdown voltage: ≥ 8.0 kV/m

• Volume resistivity: 1.7 × 10¹³ Ω·m

These properties ensure safe operation in high-voltage environments and protect sensitive electronic components.

3. Chemical and Environmental Stability

Silicone Rubber Sheet SP offers excellent resistance to environmental degradation.

• Resistant to water and moisture

• Resistant to ozone exposure

• Resistant to weathering and aging

• Chemically stable under industrial conditions

This stability ensures long service life even in outdoor or chemically aggressive environments.

4. Mechanical Flexibility and Elasticity

The material maintains flexibility across a wide temperature range.

• Hardness: 50–70 Shore A

• Elongation: approximately 60%

• Tear strength: 2.3 kN/m

This combination provides a balance between softness and structural durability, allowing it to absorb mechanical stress without cracking.

Safety and Environmental Advantages

Silicone Rubber Sheet SP is designed with safety and sustainability in mind.

Key Safety Features:

• Non-toxic and odorless

• Physiologically inert

• Environmentally friendly composition

• Complies with ROHS requirements

These characteristics make it suitable for industries with strict hygiene and safety regulations, including food and pharmaceutical sectors.

Flame Resistance and Thermal Stability

In addition to thermal resistance, the material also provides flame-retardant performance.

• Fire resistance rating: V-0 (UL 94 standard)

This indicates that the material self-extinguishes quickly and does not support continuous burning, enhancing safety in electrical and industrial environments.

Dimensional and Physical Properties

Silicone Rubber Sheet SP is available in a wide range of thicknesses and densities to meet different application needs.

Technical Data Summary:

• Thickness range: 0.3 mm – 10 mm

• Density: 1.3 – 1.5 g/cm³

• Weight loss: ≤ 1% at 200°C for 200 hours

These stable physical properties ensure consistent performance over long-term use.

Typical Industrial Applications

Due to its combination of thermal stability, electrical insulation, and chemical resistance, Silicone Rubber Sheet SP is widely used across multiple industries.

1. Aerospace Industry

• Thermal insulation components

• Vibration damping pads

• Electrical insulation barriers

2. Automotive Industry

• Gaskets and seals

• Heat-resistant insulation layers

• Engine compartment protection

3. Electrical and Electronics

• Insulation pads for high-voltage equipment

• Protective layers for circuit systems

• Cable and connector insulation

4. Pharmaceutical Industry

• Cleanroom sealing materials

• Equipment insulation pads

• Hygienic protective barriers

5. Food Processing Industry

• Food-grade sealing components

• Heat-resistant contact surfaces

• Hygienic machine linings

6. Furniture and Industrial Manufacturing

• Shock absorption pads

• Protective cushioning layers

• Industrial sealing applications

Its versatility makes it a widely adopted material in both precision engineering and general industrial use.

Advantages in Real-World Applications

Silicone Rubber Sheet SP provides several practical advantages in industrial environments:

Long Service Life

The material maintains stable performance over extended periods, reducing replacement frequency.

Easy Processing

It is easy to cut, shape, and install, making it suitable for customized manufacturing requirements.

Stable Sealing Performance

It provides consistent sealing under pressure and temperature changes, making it ideal for gasket applications.

Low Shrinkage

The material maintains dimensional stability even under thermal stress.

Technical Reliability Under Testing Standards

Silicone Rubber Sheet SP is tested under international standards to ensure performance reliability:

• ASTM D412: Tensile and elongation performance

• ASTM D2240: Hardness measurement

• ASTM D149: Dielectric breakdown strength

• ASTM D257: Volume resistivity

These standardized tests ensure consistent quality and predictable performance across applications.

Conclusion

Silicone Rubber Sheet SP is a high-performance engineering material designed for modern industrial requirements. With its combination of:

• Wide temperature resistance (-40°C to 220°C)

• Strong electrical insulation properties

• Excellent chemical and environmental stability

• Non-toxic and environmentally friendly composition

• Reliable mechanical flexibility

it serves as a dependable solution across aerospace, automotive, electronics, pharmaceutical, and food processing industries.

As industrial systems continue to demand higher safety, efficiency, and durability, silicone rubber materials like SP-grade sheets will remain essential in ensuring long-term operational stability and performance.