Hot Sale High-Temperature Silicone Rubber O-Ring Gasket

Hot Sale High-Temperature Silicone Rubber O-Ring Gasket

Main Component:
Mainly composed of polysiloxane, with stable silicon-oxygen bond structure. It is non-toxic and odorless, and is available in industrial grade, food grade and medical grade.

Temperature resistance:
It can work continuously within the temperature range of -60℃ to 230℃. It does not become brittle at low temperatures and retains elasticity at high temperatures. It can withstand short-term heat up to 300℃.
Insulation performance:
The volume resistivity ranges from 10¹³ to 10¹⁵ Ω·cm. It has high dielectric strength and is also hydrophobic. It remains stable even in a wet state.
Hardness:
The commonly used Shore A range is 40–60 (for seals), with an overall coverage of 10A–80A, suitable for soft-touch to wear-resistant applications.
Applicable to:
It is widely used in food and medical fields, electronic insulation, high and low temperature sealing, and building waterproofing. It is incompatible with strong oils, strong acids and strong alkalis.

Introduction

Product Details

Silicone gaskets are precision-engineered from high-quality silicone rubber, offering exceptional resistance to extreme temperatures, ozone, and weathering. They maintain excellent flexibility and compression set over a wide temperature range, from -60°C to 230°C (-76°F to 446F).

These gaskets provide a reliable, long-lasting seal against moisture, dust, and chemicals. Ideal for a wide range of applications including electronics enclosures, automotive assemblies, industrial machinery, and food processing equipment. Available in various hardness levels (Shore A), colors, and can be custom die-cut to your specific design and size requirements.

Silicone Rings Introduction:

Related products: Silicone plugs, rubber plugs, plugs, sealing plugs Product
Material: Environmentally friendly silicone, food grade Product
Colors: Black, White, Transparent, Customized for Other Colors

Our customized silicone gasket rings are suitable for pairing with most bottles, jars or glasses. Perfect for fridge and freezer storage, pantry storage, transporting food or beverage without leaking, home made fermenting lids, and much more.

The silicone ring gasket is made of food-grade silicone. Silicone products have good weather resistance, no deformation or aging. Not easy yellowing, use this silicone airtight seal to replace your broken sealing rings. Suitable for sealing mason jars containing small objects such as fruits, cookies, candies, salad, milk, smoothies, tea, coffee, and screws.

Silicone rubber gaskets are preferred in critical applications due to their unique set of properties:

Exceptional Temperature Resistance

Withstands a wide operating range, typically from -60°C to 225°C (-76°F to 437°F), and briefly even higher. This makes them suitable for both freezing environments and high-heat applications.

Superior Environmental Resistance

Excellent resistance to ozone, UV radiation, and weathering. They do not crack or degrade easily when exposed to sunlight and outdoor conditions, ensuring a long service life.

Excellent Flexibility & Compression Set

Remains flexible and elastic over a long period. They have good compression set resistance, meaning they return to their original shape after compression, maintaining a reliable seal.

Physiologically Inert & Safe

Odorless, tasteless, and non-toxic. They can be manufactured to comply with FDA (Food), USP Class VI (Medical), and NSF** standards, making them safe for use with food, beverages, and pharmaceuticals.

Good Chemical Resistance

Resists water, oxidation, and many common chemicals. However, they are not recommended for use with concentrated acids, alkalis, or certain solvents.

Excellent Electrical Insulation Properties

Serves as an effective electrical insulator, ideal for sealing electronic enclosures and components.

Durability and Versatility

Available in various forms (solid, sponge), colors, and hardness levels (Shore A). They can be easily custom die-cut into complex shapes and sizes.

Function of the silicone rubber o ring

O-Rings are used in sanitary pipeline systems for the Auto, Machinery, Food, Dairy, Beverage, Pharmaceutical and Bio-Tech industries. Rubber Fab offers a full line of AS568 dash numbers, metric, and specialty o-ring sizes that are manufactured using EPDM, NBR, FKM Fluoroelastomer, Buna-N, PTFE, Silicone and so on.

The o-rings used in cylinder, pump, railcars, truck, washing machine, instrument and meter, mine equipment, pipeline, household appliances, automobile, steamboat, industrial electrical equipment, building door& window, construction machinery, construction bridges and tunnel.

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Common Applications & Uses

Due to these advantages, silicone gaskets are used across a wide range of industries:

Automotive & Transportation

Engine gaskets (valve covers, oil pans)
Seals for headlights, taillights, and radiators
Intake system seals and turbocharger intercoolers
Seals for sensors and electronic control units (ECUs)

Electronics & Electrical

Sealing enclosures for outdoor telecommunications equipment
Gaskets for LED lighting fixtures and junction boxes
EMI/RFI Shielding Gaskets (when made with conductive fillers)
Seals for control panels and household appliances

Aerospace & Defense

Seals in cabin pressurization and environmental control systems
Gaskets for avionics cooling and electronic bays
Seals in fuel and oxygen systems (using specialized grades)

Food & Beverage Processing

Seals for food processing machinery (e.g., pasteurizers, homogenizers)
Gaskets for ovens, dishwashers, and refrigerators
Seals in piping, tanks, and filling machines

Medical & Pharmaceutical

Seals for medical devices (e.g., MRI machines, analyzers, pumps)
Gaskets in drug delivery systems and respiratory equipment
Seals for sterilizable (autoclavable) equipment

Industrial Machinery

Seals for pumps, compressors, and valves
Gaskets for heat exchangers, HVAC systems, and plumbing fixtures

Silicone rubber gaskets provide a reliable and long-lasting seal in the most challenging conditions. Their outstanding resistance to extreme temperatures, environmental degradation, and compression set makes them a superior choice.

Technical specifications

Material	Silicone Rubber
Specific Gravity	0.95 g/cm³
Hardness	40 ±5 Shore A
Tensile Strength	≥ 4.0 MPa
Elongation at Break	≥ 250%
Compression Set	≤ 25% (22 hrs @ 100°C)
Operating Temperature	-60°C to +200°C
Flame Rating	UL 94 HF-1

Development History

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Patents and certification

We’ve obtained various global certifications including CE, EMC, LVD, RoHS, FDA, MSDS, ISO 9001, SGS and TUV. We also own eight registered trademarks and forty technical patents to support independent R&D.

Our proprietary core technologies run through all product lines: porous ceramics, industrial ceramic components, special glass, metallized ceramics, liquid absorption cotton, ozone generators and silicone goods. All products are manufactured in strict accordance with international quality standards, delivering reliable and high-performance solutions that have gained wide recognition and market trust worldwide.

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Package

We adopt scientific and standardized packaging solutions tailored to product characteristics to effectively prevent collision, extrusion, dust and moisture damage. With mature global transportation system and strict shipment inspection procedures, we ensure all products remain intact and stable during long-distance delivery, providing customers with safe, efficient and reliable one-stop logistics service.

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Services

Inquiry & Customization

We provide fast and accurate quotation response for all your inquiries. Flexible OEM & ODM customization solutions are available to meet your unique product design, packaging and branding requirements.

Order Quality Control

We keep clients updated with full production progress throughout the whole order cycle. Our QC team carries out strict comprehensive pre-shipment inspection to guarantee all goods comply with your quality standards before delivery.

Customs Document Support

We prepare a full set of standard export documents including commercial invoice, packing list, certificate of origin and other certification papers, to ensure smooth global customs clearance for shipments to all destinations worldwide.

One-Stop Logistics

Multiple shipping methods including sea freight, air freight and express delivery are offered to match your schedule and budget. We supply real-time cargo tracking service so you can monitor shipment status anytime.

Flexible Payment

We support a wide range of secure international payment terms such as T/T, L/C, Western Union and other mainstream cross-border settlement methods to reduce your cross-border transaction risks.

After-Sales Support

Our professional after-sales team offers timely technical and business support all year round. We maintain steady long-term stable supply capacity to fully back up your continuous market sales and project demands.

FAQ

01 Question: Can you produce based on customers’ drawings or physical samples?

Answer: Absolutely yes. We accept technical drawings in all mainstream file formats as well as actual physical samples. Before formal production, our engineering team will provide a full professional DFM feasibility evaluation for your reference.

02 Question: How long is the production lead time for custom orders?

Answer: Sample lead time: 3–7 working days. Custom mold lead time: 5–10 working days (we will confirm the cycle separately with you for complex molds). Mass production lead time: 7–20 working days, depending on product structure complexity and order quantity.

03 Question: What’s your minimum order quantity for custom products?

Answer: We provide flexible MOQ solutions for all customized items. We will try our best to set a low minimum order volume to support your small-batch trial orders, meanwhile we can handle stable mass production to satisfy your long-term bulk demands.

04 Question: What customization services can you provide?

Answer: We support comprehensive one-stop customization, including product size, shape, appearance, precision tolerance, surface treatment, hole grooving, bending, cutting and adjustable high-temperature resistant parameters. Custom engraved LOGO and exclusive customized packaging are also available as extra personalized options upon request.

05 Question: Do you accept third-party inspection of finished products?

Answer: Yes, we fully cooperate with all mainstream authorized third-party testing institutions. Well-known organizations such as SGS, BV and other internationally recognized inspection bodies are all acceptable. We can supply complete official inspection reports and material certification documents as you require.

06 Question: Can you customize raw material options for products?

Answer: Sure. We can select and match appropriate raw materials according to your application scenarios, working conditions and performance requirements, including alumina, zirconia, quartz, silicone and other special engineering materials, and adjust related performance parameters to meet your usage standards.