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PRODUCTS
Specializing in the production of highquality silicone rubber products
PRODUCT
Specializing in the production of highquality silicone rubber products
— Product Categories
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Silicone tube -
LED light strip silicone sleeve -
Foamed silicone tube -
Silicone braided tube -
Medical silicone tube -
Peristaltic pump silicone hose -
Communication/power shrink tubing -
Silicone shielding strip -
Foam silicone sealing strip -
Silicone sealing strip/ring -
Bicycle handle cover/strap -
Silicone sheets and miscellaneous parts -
Silicone leather
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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.
- Composite Structure: Made from silicone, foam silicone, and a steel wire skeleton with advanced co-extrusion technology.
- Wide Temperature Resistance: Operates reliably between -60℃ and 260℃, suitable for extreme environments.
- Excellent Sealing: Waterproof, windproof, and industrial-grade sealing to ensure safety and performance.
- Durability & Anti-Aging: Resistant to weathering and aging, ensuring long service life.
- Safe & Eco-Friendly: Non-toxic, odorless, compliant with FDA standards.
- Versatile Applications: Perfect for new energy vehicle battery packs, outdoor energy cabinets, storage systems, and industrial refrigerators.
Product Features
Application
| Baby Daily Necessities | State Grid | BS/COM/ESS | Optoelectronics industry |
| mechanical seal | New energy vehicles | Home appliance | Sports equipment |
- Parameters
- Composite Structure: Made from silicone, foam silicone, and a steel wire skeleton with advanced co-extrusion technology.
- Wide Temperature Resistance: Operates reliably between -60℃ and 260℃, suitable for extreme environments.
- Excellent Sealing: Waterproof, windproof, and industrial-grade sealing to ensure safety and performance.
- Durability & Anti-Aging: Resistant to weathering and aging, ensuring long service life.
- Safe & Eco-Friendly: Non-toxic, odorless, compliant with FDA standards.
- Versatile Applications: Perfect for new energy vehicle battery packs, outdoor energy cabinets, storage systems, and industrial refrigerators.
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
U-Shaped Silicone Sealing Strip with Steel Insert
Steel-reinforced · Clip-on design · Strong grip · No adhesives · -40°C to 300°C
✓ Clips onto 1-5mm sheet metal – no gluing✓ Steel insert – strong grip, won't fall off✓ Cabinets · automotive · industrial enclosures
Steel insert – strong grip, no脱落U-shape clips onto sheet metal edgesRemovable · reusable · no adhesive residueFree 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 steel insertion and precision extrusion – three integrated factories ensure complete quality control at every stage. Steel and silicone are bonded during extrusion – not post-assembled – ensuring no delamination, no separation.
🧪
Guilin Yutian
Silicone raw material · source control
⚙️
Dongguan Huahong
Compounding & auxiliaries · cost optimization
🏗️
Dongguan Yutian
Steel-reinforced extrusion · sealing solutions
Raw materialCompoundingSteel-reinforced extrusionFinishing
6,800m² production facility14+ extrusion lines90+ production team10+ tons daily capacityISO 9001 certified
Why cabinet & automotive manufacturers choose Yutian
Steel-reinforced extrusion
Steel and silicone extruded together – not post-inserted. No delamination, no separation, long-term reliability.
Custom profiles & grip force
U-shape · D-shape · P-shape · custom · grip force adjustable for 1-5mm sheet metal.
Extreme temperature performance
-40°C to 300°C · >95% rebound · low compression set – reliable in extreme environments.
Fast sampling
15-20 days for custom profiles · full production after approval.
Integrated manufacturing
Full control from raw silicone to steel-reinforced seal – three factories, one chain.
Global certifications
ISO 9001 · RoHS · REACH · FDA/LFGB (optional)
Key advantages
🔗
Steel insert – strong grip, won't fall off
Galvanized steel or stainless steel · co-extruded
Our U-shaped silicone sealing strip with steel insert embeds a steel band or wire inside the silicone profile during extrusion – not post-inserted. The steel provides stable clamping force that grips sheet metal edges securely and won't loosen over time. Solves the common problem of adhesive-backed seals peeling off after months of use. Clamping force adjustable to match your sheet metal thickness (1-5mm).
→ Stays put · no adhesives · no脱落
🔩
U-shape clip-on – no adhesives, no screws
Clips directly onto 1-5mm sheet metal edges
The U-shaped design allows the seal to be clipped directly onto sheet metal edges – no glue, no tape, no screws. Installation is fast and requires no curing time. Removable and reusable – ideal for equipment access panels that require periodic maintenance. No adhesive residue, no clean-up.
→ Faster installation · lower labor cost
🌡️
Silicone outer – flexible sealing, extreme temperature
-40°C to 300°C · >95% rebound
The platinum-cured silicone outer layer delivers exceptional elasticity and sealing performance across a -40°C to 300°C temperature range. >95% rebound rate – returns to shape after compression. Low compression set – no permanent deformation. Ideal for outdoor cabinets, energy storage enclosures, and automotive engine compartments.
→ Seals reliably · extreme heat and cold
🏗️
Steel + silicone co-extruded – no delamination
Bonded during extrusion – not post-inserted
Unlike competitors who insert steel after extrusion (prone to separation), our steel and silicone are co-extruded – the steel is embedded during the extrusion process, creating a permanent chemical and mechanical bond. No delamination, no separation, no risk of the steel slipping out. Long-term reliability for industrial applications.
→ Built to last · no separation
📐
Customizable – profile, steel type, grip force
Galvanized steel · stainless steel · any profile
Choose from galvanized steel (cost-effective for indoor use) or stainless steel SUS304 (corrosion-resistant for outdoor, marine, and automotive applications). Customize profile shape – U-shape, D-shape, P-shape, or any cross-section. Grip force adjustable to match your sheet metal thickness. Send your drawing – we'll produce the exact seal you need.
→ Your spec · our production
🏭
Scale production – 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 15-20 days, production after approval. Bulk orders, reliable delivery – no production delays.
→ Scale · capacity · reliability
Steel insert types – choose the right one
| Steel Type | Best For | Key Benefit |
|---|---|---|
| Galvanized steel | Indoor cabinets, electrical enclosures, control panels | Cost-effective · good corrosion resistance for indoor use |
| Stainless steel (SUS304) | Outdoor enclosures, automotive, marine, energy storage | Superior corrosion resistance · salt spray resistant · long outdoor life |
💡 Selection guide: Indoor equipment → galvanized steel. Outdoor/coastal/marine → stainless steel. We can help you choose based on your environment.
Profile shapes & applications
| Profile | Description | Applications |
|---|---|---|
| U-shape | Clips onto sheet metal edges · U-shaped channel | Cabinet doors, enclosure edges, panel seals |
| D-shape | D-shaped cross-section · compression seal | Access panels, equipment doors, gaskets |
| P-shape | P-shaped profile · bulb seal | Automotive doors, weather strips, window seals |
| Custom | Any cross-section · your drawing | Non-standard applications, specialized requirements |
Technical specifications
| Parameter | Standard | Custom |
|---|---|---|
| Steel insert | Galvanized steel | Stainless steel (SUS304) |
| Silicone material | Platinum-cured silicone | |
| Profile shapes | U / D / P | Any cross-section |
| Hardness (Shore A) | 60±5 A | 40-80 A |
| Temperature range | -40°C to 300°C | Extended |
| Rebound rate | ≥95% | — |
| Sheet metal thickness | 1 – 5 mm | Adjustable |
| Color | Black / Gray | Custom colors |
| Certifications | ISO 9001, RoHS, REACH · FDA/LFGB (optional) | |
Steel-reinforced seal vs. adhesive-backed seal
| Feature | Steel-Reinforced Seal (Yutian) | Adhesive-Backed Seal |
|---|---|---|
| Fixing method | ✅ Mechanical clamping – clips on | ❌ Adhesive – peels off over time |
| Installation security | ✅ Strong grip – won't fall off | ❌ Prone to peeling and shifting |
| Reusable | ✅ Yes – removable and reusable | ❌ No – adhesive fails after removal |
| Best for | Industrial equipment, cabinets, automotive | Light-duty, household, temporary |
| Temperature range | ✅ -40°C to 300°C | ⚠️ -20°C to 80°C |
Silicone vs. rubber – steel-reinforced seals comparison
| Property | Silicone (Yutian) | Rubber |
|---|---|---|
| Temperature range | ✅ -40°C to 300°C | ⚠️ -40°C to 150°C |
| Odor | ✅ Platinum-cured · odorless | ❌ Strong rubber odor |
| Rebound rate | ✅ ≥95% | ⚠️ 80-85% |
| Food-grade option | ✅ FDA/LFGB available | ❌ No |
| Service life | ✅ Significantly longer | ⚠️ Moderate |
Applications
📦
Cabinets & enclosures
Electrical cabinets · control panels · network racks
🔋
Energy storage
Battery storage cabinets · inverter enclosures · outdoor enclosures
🚗
Automotive
Door frames · engine compartment seals · weather strips
🚇
Rail transit
Train door seals · equipment compartment seals
☀️
Solar & energy
Solar inverter cabinets · outdoor power enclosures
⚙️
Industrial equipment
Access panels · maintenance doors · machinery enclosures
Made to your specification
Steel type – Galvanized steel / Stainless steel (SUS304)
Profile shape – U / D / P / Any cross-section
Sheet metal thickness – 1-5mm (grip force adjustable)
Hardness – 40-80 Shore A
Color – Black / Gray / Custom colors
Sample lead time – 15-20 days for custom profiles
Case studies – real B2B projects
Cabinet manufacturer – U-shaped steel-reinforced seals for electrical enclosures · 1-5mm sheet metal grip · 100,000m+ delivered · 5+ years partnership · zero fall-off complaints
Energy storage equipment manufacturer – stainless steel insert seals for outdoor cabinets · corrosion-resistant · -40°C to 300°C · 3+ years outdoor · no degradation
Automotive parts supplier – steel-reinforced silicone seals for door frames · custom P-shape profile · >95% rebound · long-term sealing integrity
Solar energy company – custom-profile seals for inverter cabinets · outdoor UV resistance · stainless steel insert · IP67 waterproof · zero water ingress failures
Certifications & quality
ISO 9001
Quality management
CertifiedRoHS / REACH
Compliant
CertifiedFDA / LFGB
Food-grade option
Available⭐ National High‑tech Enterprise | 🏭 Class 8 cleanroom | 🏭 18+ years
🎁 Cooperation benefits
📦
Free samples
Standard sizes free · Sample with COA
🎨
Custom development
Sample in 15-20 days · low MOQ
⚡
Fast delivery
Production after approval
Customer feedback
“We switched from adhesive-backed seals to Yutian's steel-reinforced U-shape seals for our electrical cabinets. The clip-on design saves 70% installation time, and the steel insert ensures the seal stays in place – no more peeled-off seals from customer sites. A game-changer for our production line.”
— Production Manager, Cabinet Manufacturer
“Yutian provided stainless steel insert seals for our outdoor energy storage cabinets. The -40°C to 300°C range handles our extreme environment, and the stainless steel has shown zero corrosion after 3+ years coastal exposure. Reliable product, reliable supplier.”
— Engineering Manager, Energy Storage Company
Frequently asked questions – for B2B buyers
What is the difference between steel-reinforced and adhesive-backed seals?
Steel-reinforced seals use mechanical clamping – a steel insert grips the sheet metal edge securely, won't peel off, and is reusable. Adhesive-backed seals rely on glue that degrades over time, can peel, and cannot be reused.
What steel types are available?
Galvanized steel (cost-effective, indoor use) and stainless steel SUS304 (corrosion-resistant, outdoor/marine/automotive). We can help you choose based on your environment.
What sheet metal thickness does the U-shape fit?
Standard fits 1-5mm sheet metal. We can adjust the grip force to match your specific thickness – just let us know your requirement.
Will the steel and silicone separate over time?
No. Our steel and silicone are co-extruded – bonded during the extrusion process, not post-inserted. This creates a permanent bond that does not delaminate or separate over time.
What temperature range can these seals handle?
-40°C to 300°C – suitable for extreme cold, high-heat automotive applications, outdoor cabinets, and industrial environments.
Can you customize the profile shape and grip force?
Yes. U-shape, D-shape, P-shape, or any cross-section. Grip force adjustable for 1-5mm sheet metal. Send your drawing – we'll produce the exact seal you need.
What is the lead time for custom orders?
Samples: 15-20 days. Production: after sample approval.
Can I get a free sample?
Yes – standard sizes free for qualified B2B buyers. Contact us to request a sample for testing.
Need steel-reinforced U-shaped silicone seals for your cabinets, automotive, or industrial enclosures?
Factory-direct · Wholesale only · Free samples · OEM/ODM · Custom grip force
🎁 First 10 inquiries → free sample + priority tooling📦 Free sample with COA test report
Request a quote →Dongguan Yutian Silicone Rubber Technology Co., Ltd. | U-shaped silicone sealing strip with steel insert manufacturer | Steel-reinforced · Clip-on · -40°C to 300°C | Custom profiles & grip force | 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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