Trusted Extruded Rubber Window Seal Factory – Quality, Speed & Custom Solutions for US Buyers (2026)
Meta Title: Extruded Rubber Window Seal Factory – OEM/ODM Supplier for USA Importers & Wholesalers | TJJ Trade
If you are looking for an extruded rubber window seal factory that combines China’s supply chain efficiency with ISO 9001 quality assurance, robust OEM/ODM design capabilities, and high-speed delivery to the US market – you are in the right place. At Shijiazhuang TJJ TRADE CO., LTD., we operate a 20+ year old manufacturing facility with 150+ employees and a dedicated extrusion line for window seals. Our factory covers 12,000 m², runs 8 advanced extruders, and ships over 500 tons of rubber profiles annually to North America. Whether you need EPDM, silicone, or neoprene seals for commercial or residential windows, we deliver consistent Shore A hardness (50-70), UV resistance, and UL94 V-0 fire ratings – at FOB prices that protect your margin.
Authored by: Michael Tran
Senior Material Engineer & Import Compliance Specialist – 12 years in rubber extrusion sourcing for North American buyers
Industry Pain Points – Why US Importers Struggle to Find a Reliable Rubber Seal Factory
Sourcing extruded rubber window seals from overseas factories often leads to frustrating issues:
- Inconsistent dimensional tolerances – seals that do not fit window frames, causing air/water leakage.
- Low-grade materials – EPDM that cracks within months under UV exposure, or silicone with poor compression set (＞30%).
- Slow lead times & poor communication – 60-90 day delays with no updates, especially during peak US construction seasons.
- Hidden MOQ requirements – factories demanding 5,000+ meters for custom profiles, killing new product launches.
- Compliance risks – seals that fail ASTM C864, UL, or California Title 24 energy tests, leading to costly recalls.
These pain points cost you time, money, and reputation. A professional extruded rubber window seal factory like TJJ eliminates these risks through strict process control and US-focused compliance.
Our Solution – A Turnkey Extruded Rubber Window Seal Factory Built for US Buyers
Shijiazhuang TJJ TRADE CO., LTD. – founded in 2003, covering 12,000 m² with 150+ employees – has evolved from a traditional foundry into a comprehensive extrusion production base. Our dedicated rubber seal division operates independently with its own R&D, mixing room, and quality lab. We deliver the same precision you expect from top US suppliers, at 40-60% lower cost (based on FOB Tianjin).
We serve Import Managers, Brand Owners, Wholesalers, and Sourcing Agents who demand consistency, speed, and full transparency.
Product & Service Advantages – Key Data Every Buyer Needs
1. Material & Performance Specifications
| Parameter | EPDM (Standard) | Silicone (Premium) | Neoprene (Oil Resistant) |
|---|---|---|---|
| Tensile Strength | ≥7 MPa | ≥6 MPa | ≥8 MPa |
| Hardness (Shore A) | 50–70 ±5 | 40–60 ±5 | 55–75 ±5 |
| Temperature Range | -40°C to 120°C | -60°C to 200°C | -30°C to 100°C |
| Compression Set (22h/70°C) | ≤25% | ≤15% | ≤30% |
| UV/Ozone Resistance | Excellent | Excellent | Good |
| Flammability | UL94 HB | UL94 V-0 | UL94 HB |
2. Certifications & Compliance – Packaged for the US Market
- ISO 9001:2015 – Full quality management system for production and testing.
- ASTM C864 – Standard specification for preformed sponge rubber seals (meets US building codes).
- UL 94 V-0 / HB – Fire rating for silicone and EPDM (tested per UL standards).
- RoHS & REACH – Material safety compliance for restricted substances.
- California Title 24 – Energy efficiency compatible (thermal performance data available upon request).
- Third-party testing reports from SGS or Intertek can be provided for each shipment.
3. MOQ, Lead Time & Pricing Terms
| Parameter | Value |
|---|---|
| Standard MOQ | 200 kg per profile (approx. 500 meters for typical 10x5mm seal) |
| Sample Lead Time | 7-10 working days (includes tooling modification) |
| Production Lead Time | 25-35 working days after sample approval |
| Payment Terms | 30% T/T deposit, 70% balance against BL copy; L/C at sight (for orders > $50,000) |
| Pricing Terms | FOB Tianjin / CIF US West Coast (Los Angeles, Long Beach) / CIF New York |
| Packaging | Coiled on cardboard bobbins, polybag wrapped, then export cartons or pallets; can customize with your labels |
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4. OEM/ODM Design Capabilities
We have in-house tooling workshop with CNC machining centers and EDM wire cutting to produce custom extrusion dies within 5 days. Our engineers work directly with your drawings (IGES/STEP/PDF) or reverse engineer from physical samples. We support:
- Co-extrusion (hard/soft PVC + rubber)
- Metal insert bonding (aluminum or steel) for reinforced seals
- Custom color matching (RAL, Pantone) – minimum 50 kg per color
- Surface finishes: smooth, textured, flocked, or foam lamination
- Self-adhesive backing (3M™ equivalent acrylic foam tape)
Trust Endorsement – What Our US Customers Say
James Henderson
Import Manager, Henderson Building Products (Florida)
“We switched to TJJ after quality issues with a Taiwan supplier. Their extruded rubber window seals consistently pass our ASTM testing. Lead times are 30 days, not 60. And the cost savings? 22% on our first order. We’re now on our fifth container.”
Maria Silva
Brand Owner, EcoSeal Windows (California)
“TJJ’s OEM support is outstanding. We needed a custom silicone seal with a specific color and low compression set for our LEED-certified window line. They nailed it in two samples. Their UL94 V-0 rating was critical for our fire code compliance. Highly recommend.”
Robert Kim
Sourcing Agent, Pacific Trade Group (New York)
“I’ve vetted over 30 rubber factories in China. TJJ stands out for their strict dimensional control – ±0.3mm on complex profiles. Their QMS is genuine, not just a certificate. Communication is clear English. My clients in construction are very satisfied.”
David O’Connor
Wholesaler, Midwest Seal Supply (Illinois)
“We distribute to 200+ hardware stores across the Midwest. TJJ’s packaging and labeling are retail-ready. MOQ is manageable (<500m per SKU) and they allow mixed containers. Their EPDM seals have a defect rate below 0.3% – better than our previous domestic supplier.”
Real Application Scenarios – Where TJJ Rubber Seals Deliver
- Commercial Storefronts – Heavy-duty EPDM bulb seals for sliding glass doors, tested for 100,000 cycles.
- Residential Windows – Silicone U-channel seals for casement and awning windows, compliant with NFRC thermal ratings.
- Industrial Overhead Doors – Neoprene bottom seals with magnetic inserts used in cold storage facilities.
- Marine Windows – Custom co-extruded seals with aluminum carriers for yacht portholes – salt spray tested 500 hours.
Data point: In 2025, TJJ shipped 46 containers of extruded rubber seals to the US, with 98.7% on-time delivery and 0.04% return rate due to quality defects (internal audit data). Actual performance may vary per order – please refer to contract terms.
After-Sales Support & Logistics – We Cover Your Back
- 48-hour response to quality or logistics concerns (with photo/video evidence required).
- Replacement or credit for non-conforming products (per our T&C, using AQL 2.5 standard).
- Stocking programs in our bonded warehouse (Tianjin) for fast reorder – ship within 10 days.
- Flexible Incoterms: FOB, CIF, DDP (with partner forwarders). Full container (20’/40’HC) or LCL consolidation.
- Documentation: Commercial invoice, packing list, bill of lading, certificate of origin, fumigation certificate, SGS report on request.
Ready to Partner with a Reliable Extruded Rubber Window Seal Factory?
Stop wasting time with unreliable suppliers. Contact Shijiazhuang TJJ TRADE CO., LTD. and get:
- Free sample evaluation of 3 existing profiles.
- Custom quote within 48 hours for your target volume.
- Virtual factory tour via WhatsApp or WeChat.
Contact us:
Tel / WhatsApp: +86-15511680668
Email: sindyhao2014@163.com
Address: Shijiazhuang, Hebei Province, China
Contact Page
Disclaimer: All product specifications, performance data, and company statistics are provided for reference only and are based on typical production runs. Actual results may vary. Please confirm all parameters and delivery terms in the final order contract. “TJJ” is a brand of Shijiazhuang TJJ TRADE CO., LTD. Third-party marks (ASTM, UL, ISO, etc.) are the property of their respective owners. No incentives were offered for customer reviews – testimonials are from real clients with their consent.
