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PRODUCTS
Specializing in the production of highquality silicone rubber products
PRODUCT
Specializing in the production of highquality silicone rubber products
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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.
- Heat Resistance: Withstands high temperatures without deformation.
- Durable Material: Provides long-lasting sealing performance.
- Versatile Applications: Suitable for automotive, industrial, and food-grade use.
- Easy Installation: Designed for straightforward application in various setups.
Product Features
Application
| Baby Daily Necessities | State Grid | BS/COM/ESS | Optoelectronics industry |
| mechanical seal | New energy vehicles | Home appliance | Sports equipment |
- Parameters
- Heat Resistance: Withstands high temperatures without deformation.
- Durable Material: Provides long-lasting sealing performance.
- Versatile Applications: Suitable for automotive, industrial, and food-grade use.
- Easy Installation: Designed for straightforward application in various setups.
Product Features
Application
| Baby Daily Necessities | State Grid | BS/COM/ESS | Optoelectronics industry |
| mechanical seal | New energy vehicles | Home appliance | Sports equipment |
Yutian · Factory-direct manufacturer · 18+ years silicone extrusion expertise · 6,800m² · 14+ lines
High-Temperature Silicone Sealing Strip
250°C continuous · 300°C short-term · UL94 V-0 · High rebound · Custom profiles
✓ Industrial ovens · drying equipment✓ EV battery packs · UL94 V-0✓ Electrical cabinets · IP67 · building facades
Built-in steel band · anti-detachmentBonded rings · any shapeCustom profiles · D/P/rectangular/bulbFree samples with COA
✅ Free samples with COA test report✅ Mass production matches sample – guaranteed✅ 1% daily penalty for delayed delivery✅ Engineer 1-on-1 selection guidance
Three factories · Full industry chain synergy
From silicone compounding to precision extrusion and finishing – three integrated factories ensure complete quality control at every stage. Raw material to finished seal – fully in-house. Scale production, reliable delivery, consistent quality.
🧪
Guilin Yutian
Silicone raw material · source control
⚙️
Dongguan Huahong
Compounding & auxiliaries · cost optimization
🏗️
Dongguan Yutian
Precision extrusion · high-temp sealing
Raw materialCompoundingExtrusionFinishing
6,800m² production facility14+ extrusion lines90+ production team10+ tons daily capacityISO 9001 certified
Why Yutian
Integrated manufacturing
Full control from raw silicone to finished seal – no external dependencies.
High-temperature expertise
Specialized in 250°C~300°C silicone formulations for extreme heat.
Custom profile capability
D · P · Rectangular · Bulb · any cross-section – your drawing, our die.
Value-added services
Bonded rings · steel reinforcement · 3M tape · cutting · punching
Global certifications
ISO 9001 · RoHS · REACH · UL94 V-0 · FDA/LFGB (optional)
Scale & speed
3‑5 day sampling · 5‑7 day production · thousands of tons annual capacity
Key advantages
🌡️
Extreme heat resistance – 250°C continuous, 300°C short-term
Specialized high-temperature silicone formulation
Our high-temperature silicone sealing strip is engineered with specialized heat-resistant compounds. Standard grade performs at -40°C to 250°C continuously, with special formulations reaching 300°C short-term – ideal for industrial ovens, drying equipment, high-temperature pipelines, and EV battery packs.
→ Solves high-temperature sealing failures
🔄
High rebound >95% · low compression set<5% – no塌陷
Returns to shape · long-term sealing integrity
After repeated compression cycles – from door openings, equipment vibration, or thermal expansion – our seals return to their original shape with >95% rebound and <5% compression set. No air leakage, no permanent deformation, no maintenance – reliable sealing for years.
→ No leaks · no replacements · lower costs
🔥
UL94 V-0 flame retardant – safety certified (optional)
Self-extinguishing · fire-safe sealing
For applications requiring fire safety compliance – EV battery packs, electrical cabinets, public buildings – we offer UL94 V-0 flame retardant silicone seals. Self-extinguishing within 10 seconds, no flaming drips. Safety certified, compliance ready.
→ Fire-safe · compliance · peace of mind
🔗
Built-in steel band / wire – anti-slip & anti-detachment (optional)
Enhanced tensile strength · secure card-slot mounting
For applications requiring secure mounting, we embed steel bands or stainless steel wires into the seal profile. This enhances tensile strength, prevents detachment, and ensures stable installation – even under vibration or thermal cycling. One installation, one seal, no failures.
→ Secure · reliable · never脱落
⭕
Bonded rings – circular, square, rectangular, custom shapes
Extruded + bonded · any size · any shape
In addition to continuous strips, we offer bonded sealing rings in any shape – circular, square, rectangular, or custom. Extruded profile cut to length and bonded into closed rings with smooth, strong joints. Perfect for pipe flanges, equipment access panels, and custom machinery. Any size – from small gaskets to large 500mm+ diameter rings.
→ Any shape · any size · perfect fit
📐
Custom profiles – D, P, rectangular, bulb, or any cross-section
Your drawing · our extrusion die
We produce seals in any cross-section – D-shape, P-shape, rectangular, bulb, or custom. Low-cost extrusion dies – no expensive molds. Fast design changes, quick iteration, low tooling cost. Send your drawing – we'll produce the exact profile you need.
→ Your profile · our production
📋
Self-adhesive backing – easy installation (optional)
Peel-and-stick · 3M tape
We apply 3M tape backing to your seals for quick, secure installation – peel-and-stick application, no tools required, strong adhesion. Ideal for windows, doors, cabinets, and field installation.
→ Fast installation · secure fit
🏭
Scale production – large orders, reliable delivery
6,800m² · 14 lines · 90+ team · 10+ tons/day
With 6,800m² modern facility, 14 extrusion lines, and 90+ production team, we deliver: 10+ tons daily capacity, thousands of tons annual capacity, samples 3-5 days, production 5-7 days. Bulk orders, reliable delivery – no production delays.
→ Scale · capacity · reliability
Technical specifications
| Parameter | Standard Range | Custom Options |
|---|---|---|
| Material | High-temperature silicone | |
| Temperature range | -40°C to 250°C | Up to 300°C (short-term) |
| Hardness (Shore C) | 30 – 70 C | 15 – 90 C |
| Density (closed-cell foam) | 0.3 – 0.8 g/cm³ | Custom |
| Rebound rate | ≥95% | — |
| Compression set | <5% | — |
| Tensile strength | ≥6.5 MPa | — |
| Elongation at break | ≥300% | — |
| Tear strength | ≥20 kN/m | — |
| Flame retardancy | — | UL94 V-0 (optional) |
| Profile shapes | D / P / Rectangular / Bulb | Any cross-section |
| Built-in reinforcement | — | Steel band / Stainless steel wire |
| Backing | — | 3M tape / No backing |
| Color | Black / Gray / White | Custom colors |
| Certifications | ISO 9001, RoHS, REACH · UL94 V-0 · FDA/LFGB (optional) | |
Profile types & applications
| Profile | Dimensions (W×H mm) | Hardness (Shore C) | Applications |
|---|---|---|---|
| D-shape | 5×5 ~ 20×15 | 15-70 | Cabinet doors, enclosure edges |
| P-shape | 8×6 ~ 25×20 | 15-70 | Windows, facades, appliance seals |
| Rectangular | 3×5 ~ 30×15 | 20-70 | Machinery, equipment, general sealing |
| Bulb / 9-shape | 10×8 ~ 40×20 | 20-60 | Card-slot mounting, anti-detachment |
| Custom | Your drawing | 15-90 | Any non-standard requirement |
💡 All profiles: Closed-cell foam · Density 0.3-0.8 g/cm³ · UL94 V-0 optional · 3M tape optional · Steel reinforcement optional
Customization – made to your specification
Profile shape – D / P / Rectangular / Bulb / Custom
Temperature – standard 250°C · custom 300°C formulation
Hardness – 15-90 Shore C
Density – 0.3-0.8 g/cm³ (closed-cell foam)
Flame retardancy – UL94 V-0 (optional)
Reinforcement – Steel band / Stainless steel wire
Backing – 3M tape / No backing
Bonded rings – Circular · Square · Rectangular · Custom
Cutting – Cut-to-length · die-cut · punched
Color – Black / Gray / White / Custom
High-temperature silicone vs. EPDM vs. PVC
| Property | Silicone (Yutian) | EPDM | PVC |
|---|---|---|---|
| Temperature range | ✅ -40°C to 250-300°C | ⚠️ -40°C to 120°C | ❌ -10°C to 60°C |
| UV / Weather resistance | ✅ Excellent – 30+ years | ⚠️ Good – 15-25 years | ❌ Poor – 5-7 years |
| Low-temp flexibility | ✅ Excellent – stays flexible | ⚠️ Good | ❌ Becomes brittle |
| Heat aging resistance | ✅ Excellent – long-term | ⚠️ Moderate | ❌ Degrades rapidly |
| Flame retardant option | ✅ UL94 V-0 | ❌ Not standard | ❌ Not standard |
| Lifespan | ✅ 15-25+ years | ⚠️ 7-12 years | ❌ 5-8 years |
💡 For high-temperature applications: Silicone is the only choice. EPDM and PVC degrade rapidly at 250°C. Silicone maintains performance for decades.
Applications
🔥
Industrial ovens & drying
250°C continuous · door seals · heat chamber
🔋
EV battery packs
UL94 V-0 · IP67 · 200-250°C · fire-safe
⚡
Electrical cabinets
UL94 V-0 · IP67 · dustproof · waterproof
🏛️
Building facades
Weatherproof · UV resistant · curtain walls
🔧
High-temp pipelines
Flange seals · pipe seals · 250°C
⚙️
OEM & custom
Any application · any profile · any size
Case studies – real projects
Industrial oven manufacturer – 100,000m+ D-shape door seals annually · 250°C continuous · 5+ years partnership · zero heat-related failures
EV battery pack manufacturer – custom-profile silicone seals · UL94 V-0 certified · steel reinforcement · IP67 waterproof · thousands of battery packs sealed
Electrical cabinet manufacturer – P-shape profiles · UL94 V-0 · IP67-rated · 5+ years outdoor · no degradation · no failures
Special equipment manufacturer – 500mm diameter bonded ring · custom profile · smooth joint · delivered in 7 days · perfect fit
Certifications & quality
ISO 9001
Quality management
CertifiedUL94 V-0
Flame retardant
OptionRoHS / REACH
Compliant
Certified⭐ National High‑tech Enterprise | 🏭 Class 8 cleanroom | 🏭 18+ years
🎁 Cooperation benefits
📦
Free samples
Standard sizes free · Sample with COA
🎨
Custom development
Sample in 3‑5 days · low MOQ
⚡
Fast delivery
Stock 5‑7 days · custom 5‑7 days
Customer feedback
“We've been using Yutian's high-temperature silicone seals for our industrial ovens for five years. 250°C continuous – no failures, no degradation. The high rebound and low compression set mean our oven doors stay sealed. Reliable product, reliable supplier.”
— Production Manager, Industrial Oven Manufacturer
“Yutian provided custom-profile UL94 V-0 seals for our EV battery packs. The built-in steel reinforcement ensures secure installation, and the flame retardant certification gives us compliance confidence. Perfect fit, delivered on time.”
— Engineering Manager, EV Battery Manufacturer
Frequently asked questions
What temperature can these high-temperature silicone seals withstand?
Standard grade: -40°C to 250°C continuous. Special formulation: up to 300°C short-term. Ideal for industrial ovens, drying equipment, high-temperature pipelines, and EV battery packs.
What is UL94 V-0 flame retardancy and why does it matter?
UL94 V-0 is the highest flame retardancy rating – self-extinguishing within 10 seconds, no flaming drips. Required for EV battery packs, electrical cabinets, and safety-critical applications.
What is the rebound rate and compression set?
Rebound rate >95% – returns to original shape after compression. Compression set<5% – no permanent deformation. Long-term sealing integrity.
Can you bond seals into rings?
Yes. We bond extruded profiles into circular, square, rectangular, or custom-shaped rings. Smooth, strong joints – any size, up to 500mm+ diameter.
Can you add steel band or wire reinforcement?
Yes. Built-in steel band or stainless steel wire enhances tensile strength, prevents detachment, and improves installation stability – ideal for card-slot mounting.
Can you apply self-adhesive backing?
Yes. We apply 3M tape backing for peel-and-stick installation – quick, clean, and secure.
What profile shapes are available?
D-shape, P-shape, rectangular, bulb, and custom profiles. Any cross-section – send your drawing.
What is the typical lead time?
Samples: 3-5 days. Production: 5-7 days after approval.
Can I get a free sample?
Yes – standard sizes free for qualified B2B buyers. Contact us to request a sample for testing.
What certifications do you have?
ISO 9001, RoHS, REACH. UL94 V-0, FDA/LFGB available on request.
Need high-temperature silicone sealing strips for your oven, EV battery, or industrial equipment project?
Factory-direct · Wholesale only · Free samples · OEM/ODM · UL94 V-0 · Custom profiles
🎁 First 10 inquiries → free sample + priority tooling📦 Free sample with COA test report
Request a quote →Dongguan Yutian Silicone Rubber Technology Co., Ltd. | High-temperature silicone sealing strip manufacturer | 250°C~300°C · UL94 V-0 · >95% rebound · Custom profiles | Factory-direct · Wholesale only · ISO 9001
Tel/Whatsapp: +86 18028921514 | Email: salesmanager@yutiansilicone.com
Tel/Whatsapp: +86 18028921514 | Email: salesmanager@yutiansilicone.com
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INQUIRY
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