High Temperature Silicone O Rings Manufacturer in China | Custom Heat Resistant Silicone O-Rings for Industrial Sealing

When standard rubber seals begin to harden, crack, or lose elasticity under extreme heat, High Temperature Silicone O Rings become the preferred sealing solution. Designed for demanding environments, these seals maintain flexibility, compression recovery, and sealing integrity across a wide temperature range.

At Xiamen Jinshun Sealing Technology Co., Ltd., we have specialized in manufacturing custom silicone sealing products since 2002. Our high temperature silicone O-rings are widely used in food processing equipment, water treatment systems, automotive components, medical devices, electrical equipment, industrial machinery, and high-temperature fluid handling systems.

With ISO 9001:2015 and ISO 14001:2015 certified production systems, advanced molding technology, and globally compliant materials, we provide reliable OEM and ODM sealing solutions for international brands, distributors, and industrial equipment manufacturers.

Heat is one of the most common causes of sealing failure.

In high-temperature environments, ordinary rubber materials may experience:

• Hardening and cracking
• Compression set failure
• Loss of elasticity
• Leakage of liquids or gases
• Increased maintenance costs
• Unexpected equipment downtime

High temperature silicone O-rings are engineered to solve these challenges by maintaining sealing performance under continuous heat exposure.

Key Benefits

✓ Excellent thermal stability

✓ Outstanding flexibility at low temperatures

✓ Superior compression set resistance

✓ Non-toxic and food-safe options available

✓ Excellent UV, ozone, and weather resistance

✓ Long service life

✓ Custom sizes and colors available

✓ Suitable for static and dynamic sealing applications

Selecting the correct material is critical for long-term sealing success.

For food processing, drinking water systems, and medical equipment, silicone remains one of the most trusted sealing materials worldwide.

Food Processing Equipment

Food manufacturers require seals that can withstand repeated steam cleaning and sterilization cycles.

Common applications include:

• Beverage filling systems
• Coffee machines
• Dairy processing equipment
• Water filtration systems
• Commercial kitchen equipment

FDA and LFGB compliant silicone compounds help ensure product safety and regulatory compliance.

Water Treatment Systems

High-temperature silicone O-rings are frequently used in:

• RO membrane housings
• Water purification equipment
• Hot water dispensers
• Instant boiling water systems
• Commercial filtration systems

Their resistance to hot water and steam makes them ideal for long-term use.

Automotive Industry

Applications include:

• Engine sealing systems
• Turbocharger components
• Cooling systems
• Sensor housings
• Battery pack sealing

Silicone maintains flexibility even when exposed to fluctuating temperatures.

Medical Equipment

Medical-grade silicone O-rings are commonly used in:

• Sterilization equipment
• Diagnostic instruments
• Respiratory devices
• Fluid transfer systems

Their biocompatibility and cleanliness make them suitable for critical applications.

Electrical & Electronics

Silicone O-rings provide excellent environmental sealing for:

• LED lighting systems
• Electrical enclosures
• Outdoor communication devices
• Sensor assemblies

Their UV and ozone resistance ensure long service life in outdoor environments.

Every sealing application is different.

That is why Jinshun Sealing offers complete customization services.

Available Customization Options

Dimensions

• AS568 standard sizes
• Metric sizes
• Inch sizes
• Custom drawings
• Sample-based manufacturing

Hardness

• 40 Shore A
• 50 Shore A
• 60 Shore A
• 70 Shore A
• 80 Shore A
• 90 Shore A

Colors

Transparent

• White
• Black
• Red
• Blue
• Green
• Custom Pantone colors

Special Material Formulations

• FDA food-grade silicone
• Medical-grade silicone
• High-temperature silicone
• Flame-retardant silicone
• Conductive silicone
• Low-compression-set silicone

More Than 20 Years of Manufacturing Experience

Established in 2002, Jinshun Sealing has supplied sealing products to customers across North America, Europe, Southeast Asia, and the Middle East.

Certified Quality Management

Our manufacturing systems comply with:

ISO 9001:2015

ISO 14001:2015

Materials comply with:

ROHS

REACH

PAHS

Many compounds also meet:

FDA

LFGB

NSF

WRAS

ACS

KTW-W270

UL

Advanced Manufacturing Capabilities

• Precision compression molding
• Injection molding
• Liquid silicone rubber molding
• Custom tooling development
• In-house quality inspection

Fast OEM & ODM Support

From concept to mass production, our engineering team supports:

• Product design review
• Material selection
• Prototype development
• Mold manufacturing
• Mass production
• Global shipment

Quality Control Process

Every batch of high temperature silicone O-rings undergoes strict quality inspections including:

• Dimensional inspection
• Hardness testing
• Tensile strength testing
• Compression set testing
• Visual defect inspection
• Material verification

This helps ensure consistent performance and reliability in critical sealing applications.

What temperature can silicone O-rings withstand?

Standard silicone O-rings typically operate from -60°C to 250°C. Special high-temperature formulations can withstand temperatures up to 320°C under specific operating conditions.

Are silicone O-rings suitable for food contact applications?

Yes. FDA and LFGB approved silicone compounds are widely used in food processing equipment, beverage systems, and drinking water applications.

What is the difference between silicone and Viton O-rings?

Silicone offers better low-temperature flexibility and food safety compliance, while Viton provides superior resistance to fuels, oils, and aggressive chemicals.

Can I order custom-sized silicone O-rings?

Absolutely. Jinshun Sealing manufactures custom silicone O-rings based on drawings, samples, or application requirements.

What hardness options are available?

We offer silicone O-rings ranging from 40 Shore A to 90 Shore A, with 50A, 60A, and 70A being the most commonly requested grades.

Do you provide OEM and private label services?

Yes. We support OEM manufacturing, custom packaging, private labeling, and customized branding for distributors and industrial buyers.

What is the minimum order quantity?

MOQ depends on size, material, and tooling requirements. Contact our engineering team for a tailored quotation.

Whether you need standard AS568 O-rings, custom food-grade silicone seals, or specialized high-temperature sealing solutions, Jinshun Sealing has the expertise, manufacturing capacity, and quality systems to support your project.

From prototype development to large-volume production, we help global manufacturers reduce leakage risks, improve equipment reliability, and lower maintenance costs.

Request A Free Quote Today

Looking for a reliable High Temperature Silicone O Rings Manufacturer in China?

Send us your drawing, sample, or technical requirements today.

We Offer:

✓ Custom sizes and materials

✓ FDA, LFGB, NSF compliant compounds

✓ Fast prototyping and tooling

✓ OEM & ODM manufacturing

✓ Competitive factory-direct pricing

✓ Global shipping support

Contact Xiamen Jinshun Sealing Technology Co., Ltd. today and discover why global OEMs trust us for high-performance silicone sealing solutions.