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Silicone Sealing Strips & Gaskets — Engineered for Extreme Conditions, Built for Long-Term Reliability.
Yutian is a vertically integrated manufacturer with three specialized factories spanning silicone raw materials, compounding, and precision extrusion. By owning the entire production chain — from material formulation to finished seals — we deliver sealing solutions with consistent quality, batch-to-batch traceability, and full regulatory compliance. With 18+ years of silicone extrusion expertise, 6,800m² of production floor space, and 14+ extrusion lines, we have the scale and capability to support projects from rapid prototyping to high-volume production.
Every seal is platinum-cured to eliminate peroxide residues — ensuring zero odor, no volatile compounds, and superior purity. Our silicone sealing strips and gaskets perform reliably across a -50°C to +230°C temperature range (up to 300°C with specialized formulations), with ≥95% rebound rate and <5% compression set — maintaining sealing integrity even after millions of compression cycles. Certifications include ISO 9001, RoHS, REACH, with UL94 V-0 flame retardant and FDA/LFGB food-contact options available upon request.
Our extrusion + bonding process is the key differentiator. Unlike molding, which requires expensive metal tooling per size and cross-section, our process allows us to produce any profile, any cross-section, any length — with low tooling cost and 3-5 day sampling. From steel-reinforced U-shape seals for EV battery packs to semi-transparent optical-grade seals for LED luminaires, and from bonded food-grade rings to custom-profile door and window seals — we deliver the exact solution your application demands.
↓ Explore our sealing series below — find the exact profile for your application.
Steel-Reinforced Silicone Sealing Strip for EV Battery Packs / Metal-Insert Battery Enclosure Seal
Yutian manufactures steel-reinforced silicone sealing strips for EV battery packs and new energy vehicles. Metal insert embedded – clips onto enclosure edges with strong grip, no adhesives needed. Withstands -40°C to 300°C, high resilience, low compression set, IP67 waterproof. Ideal for battery enclosures, energy storage, and automotive sealing. Custom profiles and grip force. Factory direct, wholesale only. Free samples. ISO 9001.
U-Shaped Silicone Sealing Strip with Steel Insert / Steel-Reinforced U-Shape Silicone Seal
Yutian manufactures U-shaped silicone sealing strips with steel insert – steel-reinforced for strong grip. Clips directly onto 1-5mm sheet metal edges without adhesives. Withstands -40°C to 300°C, high resilience >95%. Ideal for cabinets, automotive, enclosures, and industrial equipment. Custom profiles and grip force. Factory direct, wholesale only. Free samples. ISO 9001.
Silicone Sealing Strip for LED Ceiling Lights / LED Luminaire Waterproof Gasket
Yutian manufactures silicone sealing strips for LED ceiling lights and luminaires – waterproof, dustproof, and UV resistant. Custom profiles and sizes. Withstands -60°C to 250°C, ideal for ceiling lights, panel lights, recessed downlights, and outdoor fixtures. Factory direct, OEM/ODM. Wholesale only. Free samples. ISO 9001.
High Temperature Silicone Sealing Strip – 250°C to 300°C Continuous Heat Resistance
Yutian manufactures high temperature silicone sealing strips rated for 250°C–300°C continuous operation. Engineered with specialized high-temp silicone formulation, maintains sealing performance, elasticity, and dimensional stability under prolonged heat exposure. Ideal for industrial equipment, automotive, ovens, and electronics. Custom profiles and sizes. Factory direct, OEM/ODM. Wholesale only. Free samples.
Extruded & Bonded Silicone Sealing Ring for Lunch Boxes / Bento Box Silicone Gasket Ring
Yutian manufactures extruded & bonded silicone sealing rings for lunch boxes and bento boxes. Platinum-cured, food-grade silicone. Extrusion + bonding eliminates expensive molds – clean, strong joints withstand 10kg pull. Leak-proof seal, FDA/LFGB compliant, -50°C to +230°C, dishwasher safe. Custom sizes, low tooling cost. Wholesale only. Free samples.
Extruded & Bonded Silicone Sealing Ring for Food Containers / Food-Grade Extruded Silicone Gasket Ring
Yutian manufactures extruded & bonded silicone sealing rings for food containers. Platinum-cured, food-grade silicone. Extrusion + bonding process eliminates expensive molds, delivers clean, strong joints (10kg tensile strength). FDA/LFGB compliant, -50°C to +230°C. Ideal for lunch boxes, fresh-keeping containers. Custom sizes, low tooling cost. Wholesale only. Free samples.
Extrusion + Bonding — The Core Process That Beats Molding
No expensive molds · Any profile, any size · Clean bonded joints · 3-5 day sampling
Extrusion produces continuous profiles of any cross-section. Automated bonding then joins the two ends into a closed ring — extrusion and bonding work together as one integrated process. This is the fundamental reason why Yutian sealing rings outperform traditional molded seals.
Unlike molding — which requires expensive, custom-built steel molds for every single size and cross-section — our extrusion + bonding process eliminates the mold bottleneck. New profiles and sizes are available in days, not weeks. Design changes are fast and inexpensive. Small batch trials are economically viable.
Unlike molding — which requires expensive, custom-built steel molds for every single size and cross-section — our extrusion + bonding process eliminates the mold bottleneck. New profiles and sizes are available in days, not weeks. Design changes are fast and inexpensive. Small batch trials are economically viable.
| Feature | Extrusion + Bonding (Yutian) | Molding |
|---|---|---|
| Tooling cost | Very low — simple extrusion die | High — custom steel mold per size/section |
| Cross-section flexibility | Any profile — D/P/E/U/rectangular/bulb/custom, quick die change | Fixed — each cross-section requires its own mold |
| Size flexibility | Any size — unlimited diameter/length, no additional tooling | Limited — each size requires its own mold |
| Ring formation | Extrusion + automated bonding — clean joint, no excess glue, 10kg tensile strength | Molded as one piece — no joint (but at high tooling cost) |
| New size lead time | Fast — 3-5 days for samples | Slow — weeks to months |
| Small batch cost | Low — no mold amortization | High — mold cost must be amortized |
| Large batch economy | Good | Excellent — but only if volume justifies tooling investment |
Steel + Silicone Co-Extrusion
Steel band or wire embedded during extrusion for enhanced tensile strength and secure mounting — ideal for U-shape seals, battery pack seals, and clip-on applications.
Extrusion + Automated Bonding
Profiles cut and bonded into closed rings with clean, strong joints — no excess glue, no misalignment, 10kg tensile strength. Perfect for food container seals, gaskets, and custom ring applications.
Optical-Grade Extrusion
Semi-transparent / transparent silicone profiles with no optical contamination. Platinum-cured, odorless, and UV-stable — ideal for LED lighting seals, luminaire gaskets, and optical applications.
Why Choose Yutian — A Silicone Sealing Partner You Can Rely On
Vertically integrated · 18+ years expertise · 14+ extrusion lines · ISO 9001
Three integrated factories span the entire silicone sealing value chain — from raw material to finished seal. Full in-house control, consistent quality, reliable delivery.
Guilin Yutian
Silicone raw material · source control
Dongguan Huahong
Compounding & auxiliaries · formulation control
Dongguan Yutian
Precision extrusion · bonding · sealing solutions
Raw material Compounding Extrusion Bonding / Finishing
6,800m²
Production Facility
14+
Extrusion Lines
50-90+
Production Team
10+ tons
Daily Capacity
18+
Years of Expertise
Vertically Integrated Manufacturing
Full control from raw silicone to finished seal — three factories, one chain. No external dependencies, consistent quality, batch-to-batch traceability.
Extrusion + Bonding — No Molds Required
Any profile, any cross-section, any size — without expensive mold costs. 3-5 day sampling, fast design iteration, and economical small-batch production.
Extreme Temperature Performance
-50°C to +230°C (up to 300°C with specialized formulations). High rebound ≥95% · low compression set <5% — reliable sealing for decades.
Global Certifications
ISO 9001 · RoHS · REACH · UL94 V-0 (optional) · FDA/LFGB (optional). Full documentation for compliance, audits, and regulatory filings.
Fast Sampling & Reliable Delivery
3-5 day sampling · 5-15 day production after approval. Low MOQ, free samples for qualified buyers, and on-time delivery you can count on.
National High‑Tech Enterprise
Recognized for technical innovation and R&D capability. 18+ years of silicone extrusion expertise. ISO Class 8 cleanroom for critical applications.
Where Our Seals Are Used — Applications Across Industries
From industrial ovens to EV battery packs and food containers, Yutian silicone seals deliver reliability, durability, and compliance in the most demanding environments.
Industrial Ovens & Drying Equipment
High-temperature door seals for industrial ovens, drying chambers, and heat treatment equipment. Withstands 250°C continuous (300°C short-term), high rebound ≥95%, low compression set <5% — maintains sealing integrity through thousands of open-close cycles.
250°C Continuous ≥95% Rebound UL94 V-0
EV Battery Packs & Energy Storage Systems
Steel-reinforced silicone seals for EV battery pack enclosures and energy storage cabinets. Co-extruded steel + silicone provides strong mechanical grip — no adhesives, no peeling under vibration. IP67/IP68 waterproof, UL94 V-0 flame retardant, -40°C to 300°C.
Steel-Reinforced -40°C to 300°C IP67/IP68 UL94 V-0
LED Lighting Fixtures
Semi-transparent silicone seals for ceiling lights, panel lights, downlights, and outdoor luminaires. Platinum-cured — no odor, no optical contamination. Translucent finish enables quick visual QC inspection. IP67 waterproof, -60°C to 250°C.
Semi-Transparent Platinum Cured IP67 -60°C to 250°C
Electrical Cabinets & Enclosures
U-shape clip-on silicone seals for electrical cabinets, control panels, and outdoor enclosures. Steel insert provides strong grip — clips directly onto 1-5mm sheet metal edges. No adhesives, no screws, reusable. Dustproof, waterproof, UL94 V-0 flame retardant available.
Clip-On Design Steel Insert 1-5mm Sheet Metal UL94 V-0
Food Containers & Packaging
Extruded + bonded silicone sealing rings for lunch boxes, fresh-keeping containers, and food storage. FDA and LFGB certified — 100% food-contact safe. Platinum-cured — no odor, no taste transfer. -50°C to +230°C, microwave, freezer, and dishwasher safe.
FDA LFGB Food-Grade -50°C to +230°C
Building Windows & Doors
Custom-profile silicone seals for window and door OEM manufacturing, after-sales replacement, and building facade projects. Any cross-section, any Pantone color, ±0.1mm tolerance. UV and weather resistant — 30-40 year service life.
Custom Profiles Any Pantone Color ±0.1mm 30-40 Year Life
Automotive & General Industrial
Multi-purpose extruded silicone seals for automotive door frames, engine compartments, equipment access panels, and machinery enclosures. Available as continuous strips (coils or cut-to-length) or bonded gaskets. Sealing · waterproof · dustproof · anti-vibration · noise reduction · shock absorption — six functions in one.
Sealing Waterproof Anti-Vibration Noise Reduction
New Energy Charging Infrastructure
Weather-resistant silicone seals for EV charging stations, charging gun connectors, and outdoor power distribution cabinets. UV resistant, -40°C to 230°C, IP67 waterproof. Custom profiles match your specific equipment design — protect sensitive electronics from moisture, dust, and extreme temperatures.
UV Resistant -40°C to 230°C IP67 Custom Profiles
Silicone vs. EPDM vs. PVC — Which Sealing Material Is Right for Your Application?
Every material has its strengths and limitations. Understanding the trade-offs helps you make the right choice — balancing performance, service life, and total cost of ownership.
Sealing strips are critical components that protect against air, water, dust, vibration, and temperature extremes[reference:56]. The three most common materials — silicone, EPDM, and PVC — each serve different purposes. Silicone offers the widest temperature window and purest material properties, making it the top choice for demanding applications. EPDM provides excellent weather resistance at a moderate cost, ideal for outdoor general-purpose sealing. PVC is the most economical option, suitable for indoor, light-duty applications where cost is the primary concern[reference:57].
| Property | Silicone (Yutian) | EPDM | PVC |
|---|---|---|---|
| Continuous temperature range | -60°C to +230°C[reference:58] | -40°C to +120°C[reference:59] | -20°C to +70°C[reference:60] |
| Maximum short-term temperature | Up to +300°C[reference:61] | Up to +150°C[reference:62] | Up to +80°C |
| UV / Ozone resistance | ✅ Excellent[reference:63] | ✅ Excellent[reference:64] | ⚠️ Moderate — degrades with long-term sun exposure[reference:65] |
| Low-temperature flexibility | ✅ Outstanding — stays soft[reference:66] | ✅ Excellent[reference:67] | ❌ Becomes hard and brittle in cold weather[reference:68] |
| Compression set resistance | ✅ Excellent | ✅ Excellent[reference:69] | ❌ Poor — permanent deformation |
| Chemical resistance | ✅ Resists acids, alkalis, water | ✅ Resists acids, alkalis, polar solvents[reference:70] | ⚠️ Moderate[reference:71] |
| Oil / fuel resistance | ❌ Poor — not oil-resistant[reference:72] | ❌ Poor — swells in oils[reference:73] | ⚠️ Moderate |
| Mechanical strength | ⚠️ Lowest among rubber materials[reference:74] | ✅ Good[reference:75] | ✅ Moderate |
| Food / medical grade | ✅ FDA/LFGB available[reference:76] | ❌ Not available | ❌ Not available |
| Odor | ✅ Odorless[reference:77] | ⚠️ Slight rubber odor | ❌ Plastic odor |
| Plasticizer migration | ✅ None | ✅ None | ❌ Yes — leaches over time, causes hardening[reference:78] |
| Service life | 15-25+ years | 7-12 years[reference:79] | 5-8 years[reference:80] |
| Relative cost | Higher | Medium[reference:81] | Low[reference:82] |
* Data compiled from industry technical resources and material property databases. Actual performance may vary based on specific compound formulations, profile design, and working conditions[reference:83].
Frequently Asked Questions — Silicone Sealing Strips & Gaskets
Quick answers to the most common questions from engineers, procurement professionals, and quality managers — all in one place.
Materials & Performance
Process & Customization
Steel-Reinforced Products (U-Shape Seals)
Samples & Procurement
Certifications & Compliance
Still have questions? We're here to help — reach out to our engineering team directly.
Contact Us →Silicone Sealing Strips & Gaskets — Sealing Solutions You Can Count On.
From industrial ovens running at 300°C to food containers that need FDA-certified safety, Yutian's silicone seals deliver performance, durability, and compliance across the most demanding applications. Our extrusion + bonding process means any profile, any size, without expensive molds — giving you the flexibility to design without limits, and the speed to bring products to market faster.
Backed by 18+ years of silicone extrusion expertise, ISO 9001, RoHS, REACH, and a vertically integrated supply chain — we don't just make seals. We deliver sealing confidence. From prototype to production, every seal, every batch, every time.
Trust Yutian. Trust the seal.
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One-Stop Silicone Product Solution — Engineered for Excellence, Delivered with Integrity.
From medical-grade tubing and precision peristaltic pump hoses to custom-extruded sealing strips and gaskets — Yutian serves industries where quality is not optional. Our vertically integrated supply chain spans raw silicone compounding, precision extrusion, and finished assembly, ensuring consistent quality across every product line. Whether your application demands ISO 13485 medical compliance, FDA/LFGB food-contact safety, or extreme-temperature industrial performance, we deliver solutions engineered to your exact requirements.
With 18+ years of silicone expertise, ISO 9001 certification, and a commitment to innovation recognized as a National High-Tech Enterprise — we don't just manufacture silicone products. We partner with you from concept to production, providing engineering support, rapid sampling, and reliable delivery that you can count on. Because when performance matters, there's no room for compromise.
Trust Yutian. Trust the difference.
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