Silicone Gasket

Our factory supplies premium custom silicone gasket (silicone rubber gasket / silicone seal / silicone sealing ring) solutions for food-grade and industrial-grade applications across multiple industries. Made from 100% virgin silicone rubber with precise durometer control, superior high/low temperature resistance, excellent aging & ozone resistance, high elasticity and reliable waterproof/oil-proof/airtight sealing performance, these silicone gaskets are fully customizable in size, shape, hardness, color and surface finish - engineered to meet the exact sealing requirements of food machinery, automotive, medical devices, electronics, plumbing, industrial piping and home appliances. A safe, durable and high-performance sealing solution that outperforms traditional rubber, plastic, cork and metal gaskets.

Full parameters are listed in the table below:

The silicone gasket is a critical sealing component used across virtually every industry - from food processing machinery and medical devices to automotive engines, electronic enclosures, plumbing fixtures and industrial piping. A gasket's job is simple but essential: create a reliable seal between two mating surfaces, preventing the leakage of liquids, gases or vapors, while withstanding temperature extremes, pressure, vibration, chemical exposure and long-term compression. Despite this simple function, choosing the wrong gasket material can lead to costly failures - leaks that contaminate products, damage equipment, cause downtime, or create safety hazards. Traditional gasket materials each have significant limitations. Nitrile rubber (NBR) gaskets are oil-resistant but have limited temperature range (typically -30℃ to +120℃) and can harden and crack with age. EPDM gaskets have good weather resistance but poor oil resistance and are not suitable for food contact. Cork and paper gaskets are cheap but absorb fluids, degrade quickly, are single-use, and cannot withstand high temperatures or pressures. Plastic (PTFE/nylon) gaskets are chemical-resistant but have poor elasticity, high compression set, and can crack or cold-flow under load. Metal (copper/aluminum/steel) gaskets can withstand high temperatures and pressures but are heavy, require high tightening torque, do not conform well to surface irregularities, and are not reusable. Our silicone gaskets address every one of these shortcomings with a material that offers an unmatched combination of temperature resistance, elasticity, durability, chemical stability and sealing reliability.

Crafted from 100% virgin silicone rubber (VMQ), our gaskets offer exceptional performance across a wide range of demanding environments. The standard temperature range of -60℃ to +230℃ covers virtually all industrial, automotive and food processing applications - with high-temperature grades available up to +260℃ and low-temperature grades down to -80℃ for extreme environments. Unlike nitrile rubber that hardens and cracks at high temperatures, or cork/paper that disintegrates, silicone maintains its elasticity and sealing performance even after prolonged exposure to heat, cold, ozone and UV radiation - with an outdoor service life of 10+ years. The high elasticity and low compression set (less than 15% at 70℃ x 22h) ensure that the gasket retains its sealing force even after years of compression - unlike plastic gaskets that cold-flow and lose seal, or cork gaskets that crush and require re-torquing. Silicone is also inherently food-safe - our food-grade formulations comply with FDA 21 CFR 177.2600 and LFGB standards, making them ideal for food and beverage machinery, brewing equipment, dairy processing and kitchen appliances. For medical applications, our medical-grade silicone is biocompatible per ISO 10993. The material is also an excellent electrical insulator (dielectric strength 20kV/mm), making it ideal for electronic enclosures and electrical connectors. Flame-retardant grades (UL94 V-0) are available for applications requiring fire safety. Every gasket is fully customizable - we can produce virtually any size (from 1mm inner diameter to 2000mm), any shape (O-rings, flat washers, custom profiles, diaphragms), any hardness (20A to 90A Shore A), and any color - with precision tolerances down to ±0.05mm for critical sealing applications.

Core Selling Points

This page emphasizes 100% virgin silicone material + extreme temperature resistance (-60℃ to +230℃) + high elasticity & low compression set + food-grade/medical-grade/industrial-grade formulations + full customizability (size/shape/hardness) + multi-industry sealing applications as the differentiated selling angle.

Extreme temperature resistance, stable sealing from -60℃ to +230℃: The most significant advantage of silicone gaskets over traditional gasket materials is their exceptional temperature resistance. Standard silicone gaskets maintain their elasticity and sealing performance across a temperature range of -60℃ to +230℃ (-76℉ to +446℉) - a range that covers virtually all industrial, automotive, food processing and plumbing applications. For extreme environments, high-temperature grades are available up to +260℃ (+500℉) and low-temperature grades down to -80℃ (-112℉). This is in stark contrast to nitrile rubber (NBR) gaskets, which typically only handle -30℃ to +120℃ and harden/crack at higher temperatures; EPDM gaskets, which handle -40℃ to +150℃ but have poor oil resistance; cork/paper gaskets, which degrade at temperatures above 120℃; and plastic gaskets, which can melt or cold-flow at elevated temperatures. The wide temperature range means one silicone gasket can be used in applications that experience both freezing cold (outdoor equipment, refrigeration systems, cold climate automotive) and intense heat (oven doors, engine compartments, industrial ovens, steam systems) - eliminating the need for multiple gasket materials and simplifying inventory. Silicone also has excellent thermal stability - it does not soften excessively at high temperatures or become brittle at low temperatures, maintaining consistent sealing force across the entire temperature range.

High elasticity & low compression set, retains seal after years of compression: A gasket's most critical performance attribute is its ability to maintain sealing force after long-term compression - a property measured by compression set. Our silicone gaskets feature high elasticity (elongation at break 200-600%, tensile strength 5-10 MPa) and exceptionally low compression set (less than 15% at 70℃ x 22h per ASTM D395), meaning the gasket retains its original shape and sealing force even after years of being compressed between two mating surfaces. This is a critical advantage over plastic (PTFE/nylon) gaskets, which have high compression set and cold-flow under load - gradually losing thickness and sealing force over time, requiring re-torquing or replacement. It is also superior to cork and paper gaskets, which crush permanently under compression and are single-use (cannot be reused after disassembly). The high elasticity of silicone also allows the gasket to conform to surface irregularities - minor scratches, machining marks, surface waviness or slight misalignment are accommodated by the flexible silicone, ensuring a complete seal even when mating surfaces are not perfectly flat. This conformability reduces the need for expensive surface machining and makes silicone gaskets ideal for applications with imperfect or worn surfaces. Unlike metal gaskets that require high tightening torque to conform, silicone gaskets seal effectively with moderate torque - reducing the risk of over-tightening, flange warping or bolt breakage. The low compression set also means silicone gaskets are reusable - after disassembly, the gasket returns to its original thickness and can be reinstalled, reducing maintenance costs and waste.

Superior aging, ozone & UV resistance, 10+ year outdoor lifespan: Silicone rubber is inherently resistant to aging, ozone, UV radiation and weathering - properties that make it ideal for outdoor and long-service-life applications. Unlike nitrile rubber (NBR) and other organic rubbers, which are susceptible to ozone cracking (surface cracking caused by atmospheric ozone, especially in urban and industrial environments) and UV degradation (discoloration, hardening and cracking from sunlight exposure), silicone rubber has a fully inorganic polymer backbone (Si-O-Si) that is inherently resistant to ozone and UV attack. This means silicone gaskets can be used outdoors for 10+ years without significant degradation - maintaining their elasticity, color and sealing performance even after prolonged exposure to sunlight, rain, snow, ozone and temperature cycling. This is a critical advantage for outdoor applications such as automotive door/window seals, exterior lighting gaskets, solar panel seals, outdoor equipment enclosures, marine equipment and construction machinery - where gasket failure due to weathering can lead to water ingress, corrosion and equipment damage. Silicone is also resistant to many chemicals, including water, steam, dilute acids and bases, alcohols, and some oils - making it suitable for a wide range of industrial environments. For applications requiring oil resistance, our fluorosilicone (FVMQ) formulations offer improved oil and fuel resistance while maintaining the temperature and weathering benefits of silicone.

Food-grade & medical-grade safety, FDA/LFGB/ISO 10993 compliant: One of the most important differentiators of silicone gaskets is their availability in food-grade and medical-grade formulations that meet the world's most stringent safety standards. Our food-grade silicone gaskets comply with FDA 21 CFR 177.2600 (United States) and LFGB (Germany/Europe) food-contact standards - making them safe for direct contact with food and beverages in food processing machinery, brewing equipment, dairy processing, pharmaceutical manufacturing and kitchen appliances. Unlike nitrile rubber gaskets, which may contain plasticizers or curing agents that can migrate into food, and cork/paper gaskets, which can absorb food particles and bacteria, our food-grade silicone is non-porous, non-toxic, odorless and tasteless - it will not contaminate food or alter its flavor. The non-porous surface is also easy to clean and sanitize - an essential requirement for food processing equipment that must meet strict hygiene standards (HACCP, 3-A Sanitary Standards, EHEDG). For medical and pharmaceutical applications, our medical-grade silicone is biocompatible per ISO 10993 (cytotoxicity, sensitization, irritation testing) - making it suitable for medical device seals, syringe plunger gaskets, prosthetic components, surgical instruments and pharmaceutical manufacturing equipment. The availability of food-grade and medical-grade formulations, combined with full traceability and batch certification, makes our silicone gaskets the preferred choice for industries where product safety and regulatory compliance are non-negotiable.

Full customizability, any size/shape/hardness/color with precision tolerance: Unlike standard off-the-shelf gaskets that come in limited sizes and shapes, our silicone gaskets are fully customizable to meet your exact sealing requirements. We can produce virtually any size - from tiny O-rings with 1mm inner diameter for precision electronics and medical devices, to large-diameter gaskets up to 2000mm (78.7in) for industrial flanges, pressure vessels and large piping. Any shape - including standard O-rings, flat washers, square/rectangular gaskets, D-shape seals, U-cups, V-rings, lip seals, diaphragms, custom profile extrusions, and fully custom molded shapes based on your drawings or samples. Any hardness - from soft 20A Shore A for low-pressure sealing, cushioning and vibration isolation, to firm 90A Shore A for high-pressure, high-torque and load-bearing applications - with standard stock hardness of 50A and 60A. Any color - transparent, white, black, red, blue, green, yellow, gray, or custom Pantone color matching - with food-grade gaskets typically white or transparent for visibility and easy inspection. We also offer options for adhesive backing (3M or custom adhesive for easy installation), fabric reinforcement (for high-pressure applications), sponge/cellular silicone (for low-pressure sealing and cushioning), and flame retardant formulations (UL94 V-0). Precision tolerances down to ±0.05mm are available for critical sealing applications. Our in-house tooling department can design and manufacture custom molds within 7-15 days, and our engineering team can assist with material selection, hardness optimization and design for manufacturability - ensuring you get the right gasket for your specific application, not a compromise.

Solutions for Buyer Concerns

We fully address global purchasers' primary concerns - pricing transparency, quality assurance, packaging durability and production craftsmanship - for every batch of silicone gasket:

Factory-direct transparent pricing & cost-effective value: As an original silicone rubber manufacturer, we control the entire production chain from silicone raw material compounding and molding to post-curing, trimming, inspection and packaging. Tiered volume discounts are offered with no hidden fees, enabling importers, distributors and OEMs to maintain healthy margins while offering customers a high-performance sealing solution. Our silicone gaskets are priced competitively against nitrile rubber, EPDM and cork gaskets - while offering superior temperature resistance, longer service life and reusability that reduce total cost of ownership. Custom tooling fees are transparently priced based on mold complexity and size, and are refundable for large volume orders. We also offer material optimization consulting - our engineers can recommend the most cost-effective silicone formulation and hardness for your application, avoiding over-specification that increases cost unnecessarily.

Multi-stage rigorous quality inspection & material certification: Each production lot undergoes raw material batch testing (hardness, tensile strength, elongation, specific gravity), food-grade testing (FDA/LFGB extraction tests), medical-grade biocompatibility testing (ISO 10993, where applicable), high-temperature aging test (230℃ x 70h, verify no hardening/cracking), low-temperature flexibility test (-60℃, verify no brittleness), compression set test (70℃ x 22h, ASTM D395), ozone resistance test (50 pphm ozone x 72h, verify no cracking), dimensional inspection (100% for critical dimensions, AQL sampling for standard), hardness verification (Shore A durometer), visual inspection (no flash, voids, bubbles, discoloration), and certificate of conformity (COC) with batch traceability. Defective rates are tightly controlled for bulk orders, and full material test reports including food safety certifications are available for customs clearance and regulatory compliance.

Protective packaging & flexible logistics: Individual gaskets are packed in PE or OPP bags to prevent dust, moisture and deformation during transit. Multi-piece sets use cardboard dividers or custom trays to prevent size mixing and damage. Large-diameter gaskets are carefully coiled or laid flat with protective separation to prevent permanent deformation. Bulk cartons use reinforced corrugated boxes with proper cushioning. We partner with multiple logistics providers to offer sea, air and express options, balancing delivery speed and freight cost according to your schedule and budget. For urgent MRO (maintenance, repair and operations) orders, we offer expedited production and express shipping options.

Precision molding craftsmanship & consistent material quality: The silicone gaskets are produced via high-temperature compression molding or transfer molding in a controlled cycle - each gasket is formed with uniform density, smooth surface and precisely controlled dimensions. The silicone material is compounded in-house with precise durometer control (±5 Shore A) and consistent batch-to-batch quality. Post-curing (secondary vulcanization) is performed to remove residual curing byproducts and optimize mechanical properties - an essential step for food-grade and medical-grade gaskets. Flash removal is performed by precision trimming or cryogenic deflashing for clean, professional edges. Compared with cheap, poorly compounded alternatives that use fillers, recycled material or inconsistent curing, our product maintains consistent hardness, dimensional accuracy, temperature resistance and sealing performance across every batch - critical for applications where gasket failure can lead to costly downtime or safety hazards.

Competitive Advantages & Peer Comparison

Most gaskets on the market fall into five material categories, each with significant drawbacks. Nitrile rubber (NBR) gaskets are the most common industrial gasket - they offer good oil resistance and low cost, but have a limited temperature range (typically -30℃ to +120℃), are susceptible to ozone cracking and UV degradation (not suitable for outdoor long-term use), can harden and lose elasticity with age, and are not food-grade (may contain plasticizers that migrate into food). EPDM gaskets offer good weather and ozone resistance and are suitable for outdoor use, but have poor oil and hydrocarbon resistance (will swell and degrade in contact with oils, fuels and greases), have a limited temperature range (-40℃ to +150℃), and are not food-grade. Cork and paper gaskets are cheap and conformable, but absorb fluids (oil, water, chemicals), degrade quickly, are single-use (cannot be reused after disassembly), cannot withstand high temperatures or pressures, and can leave residue on mating surfaces. Plastic (PTFE/nylon) gaskets offer excellent chemical resistance, but have poor elasticity and high compression set (cold-flow under load, gradually losing sealing force), are brittle (can crack under impact or vibration), require high tightening torque, and are not suitable for dynamic sealing. Metal (copper/aluminum/steel) gaskets can withstand high temperatures and pressures, but are heavy, require very high tightening torque (risk of flange warping and bolt breakage), do not conform well to surface irregularities, are not reusable, and can corrode or gall. None of these alternatives delivers a balanced combination of wide temperature range, high elasticity, low compression set, weather/ozone/UV resistance, food/medical safety, chemical stability and reusability.

Our silicone gasket achieves that balance and exceeds expectations on every dimension. The wide temperature range (-60℃ to +230℃, with extreme grades available) covers applications that would require multiple different gasket materials - from freezing outdoor equipment to hot oven doors and engine compartments. The high elasticity and low compression set ensure long-term sealing reliability without re-torquing or frequent replacement - unlike plastic gaskets that cold-flow, or cork gaskets that crush. The superior aging, ozone and UV resistance provides 10+ years of outdoor service life - unlike nitrile rubber that cracks from ozone, or cork/paper that degrades from moisture. The food-grade and medical-grade formulations meet FDA, LFGB and ISO 10993 standards - unlike nitrile, EPDM or cork that are not food-safe. The excellent electrical insulation (dielectric strength 20kV/mm) makes silicone ideal for electronic and electrical sealing - unlike metal gaskets that conduct electricity. The reusability (gaskets return to original shape after disassembly) reduces maintenance costs and waste - unlike cork, paper and metal gaskets that are single-use. The full customizability (any size, shape, hardness, color) ensures a perfect fit for every application - unlike standard off-the-shelf gaskets that require compromise. For engineers, maintenance teams and procurement managers, this translates to a gasket with higher reliability, longer service life, lower total cost of ownership, broader application versatility and full regulatory compliance - reducing downtime, maintenance costs and safety risks across industries.

Usage, Installation & Maintenance Instructions

Proper installation and maintenance ensure optimal sealing performance and extend the service life of your silicone gaskets:

Installation guidelines: Before installation, inspect the gasket for any defects (cuts, tears, voids, bubbles, discoloration, dimensional inaccuracies) - do not install a damaged gasket. Clean both mating surfaces thoroughly - remove all old gasket residue, dirt, grease, rust and corrosion using a suitable solvent and a non-abrasive scraper. Ensure mating surfaces are dry and free of debris before installing the new gasket. Place the gasket centered on the mating surface - ensure bolt holes align properly (for gaskets with bolt holes) and the gasket does not obstruct any flow passages. Do not stretch the gasket excessively during installation - silicone is elastic but over-stretching can cause permanent deformation or uneven compression. For adhesive-backed gaskets: remove the protective liner and apply the gasket to the clean, dry surface, pressing firmly to ensure full contact. Allow the adhesive to cure for the recommended time before applying pressure or fluid. Tighten bolts in a crisscross (star) pattern to ensure uniform compression - tighten gradually in 2-3 stages, reaching the final torque specification on the last pass. Do not over-tighten - excessive compression can cause the gasket to extrude, crack or lose elasticity. Refer to the recommended compression (typically 15-30% of gasket thickness for static sealing) and torque specifications for your application. For high-temperature applications, re-torque the bolts after the first thermal cycle (heating and cooling) to compensate for any initial compression set.

Operating limits & compatibility: Ensure the gasket material, hardness and temperature rating are suitable for your application's operating conditions - including temperature range, pressure, fluid/media type, and dynamic vs. static sealing. Standard silicone gaskets are suitable for water, steam, dilute acids and bases, alcohols, and some oils. For applications involving fuels, hydrocarbons, mineral oils or strong solvents, use fluorosilicone (FVMQ) gaskets instead - standard silicone may swell in contact with these media. Do not exceed the rated temperature range - prolonged exposure above the rated temperature can cause hardening, cracking or degradation. Do not use silicone gaskets in direct contact with open flame or molten metal. For dynamic sealing applications (moving parts), ensure the gasket design and hardness are suitable - dynamic sealing requires careful consideration of friction, wear and lubrication. For food and medical applications, ensure the gasket is the appropriate food-grade or medical-grade formulation and that all post-curing and cleaning procedures are followed.

Cleaning & maintenance: During scheduled maintenance, inspect gaskets for signs of wear, compression set, cracking, hardening, discoloration, extrusion or leakage. Replace gaskets that show significant compression set (flattened, no longer returning to original thickness), cracking, hardening, or visible leakage. Silicone gaskets are reusable - if a gasket is in good condition after disassembly (no damage, minimal compression set), it can be cleaned and reinstalled. To clean: wipe with a clean cloth and a mild detergent or isopropyl alcohol - avoid using abrasive cleaners, steel wool or harsh solvents that may damage the silicone surface. For food-grade and medical-grade gaskets, follow the appropriate cleaning and sanitization procedures (CIP/SIP, autoclaving, or chemical sanitization) - silicone is compatible with most common sanitizers and can be autoclaved at 121℃. Do not use sharp tools to remove gaskets - use plastic or wooden tools to avoid scratching mating surfaces or damaging the gasket. Store spare gaskets in a cool, dry, dark place away from direct sunlight, ozone sources (electric motors, welding equipment) and extreme temperatures - hang or lay flat to avoid permanent deformation. Do not store gaskets under heavy objects or in compressed condition for extended periods.

Replacement & disposal: Replace gaskets at the first sign of failure or during scheduled maintenance intervals - do not wait for a catastrophic leak. The service life of a silicone gasket depends on the application (temperature, pressure, media, dynamic vs. static) - in benign static applications, silicone gaskets can last 10+ years; in harsh high-temperature or dynamic applications, replacement may be needed more frequently. Keep spare gaskets in stock for critical equipment to minimize downtime. At end of life, silicone gaskets can be disposed of in general waste (silicone is non-toxic and does not leach harmful chemicals) or recycled through specialized silicone recycling programs. Do not incinerate silicone gaskets without proper emissions control - while silicone is non-toxic, combustion can produce silica dust.

We are a specialized silicone rubber products manufacturer with extensive experience in OEM & ODM production for global industrial, automotive, medical and consumer markets. Our facility houses automated silicone compression molding and transfer molding lines, an in-house silicone compounding department, a post-curing oven facility, a precision trimming and cryogenic deflashing department, a material testing laboratory, and a dedicated quality control team - ensuring consistent output capacity and reliable batch quality for orders of any scale, from custom prototype gaskets to high-volume OEM production runs.

Production capacity: Multiple automated molding lines and a dedicated finishing team support stable daily output, enabling on-time delivery for both small-batch custom prototype orders and large-volume OEM/ODM shipments across all sizes, shapes, hardnesses and formulations. In-house tooling department designs and manufactures custom molds within 7-15 days.

Certification system: Products comply with FDA 21 CFR 177.2600, LFGB, RoHS, REACH, UL94 V-0 (flame retardant), ISO 10993 (medical biocompatibility) standards. Our quality management system is certified to ISO 9001 and IATF 16949 (automotive), satisfying import requirements for Europe, North America, Southeast Asia, the Middle East and other major markets. Full material test reports and certificates of conformity (COC) with batch traceability are available for every production lot.

R&D and customization: Our in-house engineering and R&D team supports custom gasket design (based on your drawings, samples or application requirements), material formulation development (custom temperature grades, oil-resistant fluorosilicone, flame retardant, conductive silicone, foam/sponge silicone), hardness optimization, finite element analysis (FEA) for sealing performance prediction, prototyping (3D-printed molds for quick prototypes), and full production tooling. We can turn your concept or drawing into a production-ready sample within 7-15 days, and offer design for manufacturability (DFM) consulting to optimize cost and performance.

Packaging capability: We offer PE/OPP polybags, blister packs, cardboard boxes, bulk cartons, custom labeling with part numbers and batch codes, individual packaging for MRO supply, and bespoke retail packaging - tailored to your distribution channel and brand requirements. Large-diameter gaskets are specially packed to prevent permanent deformation during transit.

• Factory-direct supply & cost-effective total ownership: No middleman markup, competitive wholesale pricing and stable production capacity for consistent MRO supply and OEM production. Superior temperature resistance, reusability and 10+ year service life reduce total cost of ownership compared to nitrile, cork and plastic gaskets that require frequent replacement.
• Superior material performance & wide application versatility: 100% virgin silicone + extreme temperature resistance (-60℃ to +230℃) + high elasticity & low compression set + aging/ozone/UV resistance + food/medical-grade safety + electrical insulation delivers sealing performance that nitrile, EPDM, cork, plastic and metal gaskets cannot match across food, automotive, medical, electronics, plumbing and industrial applications.
• Full customizability & engineering support: One-stop OEM/ODM service from custom size/shape/hardness/color development to material formulation, prototyping, tooling design and full production - with free engineering consulting for material selection, hardness optimization and design for manufacturability. In-house tooling within 7-15 days.
• Proven quality & regulatory compliance: Multi-stage inspection including raw material batch testing, high/low temperature testing, compression set testing, ozone resistance testing, dimensional inspection and hardness verification, plus FDA / LFGB / ISO 10993 / UL94 V-0 / RoHS / REACH / IATF 16949 / ISO 9001 certifications ensure reliable batch quality and smooth customs clearance for food, medical and automotive industries.
• Reliable supply & after-sales partnership: Stable production capacity, flexible logistics (sea/air/express), expedited options for urgent MRO orders, dedicated account management for OEM customers, custom inventory programs (consignment/JIT), and responsive technical support for installation, maintenance and failure analysis - for a smooth long-term partnership.

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