China Aluminum Windows Accessories Suppliers Roundup

Today's digest features 8 verified Chinese manufacturers across all four priority parts — wool pile/EPDM seal strips, aluminum corner keys/angle connectors, zinc die-cast sliding window pulleys/rollers, and aluminum profile assemblies. All suppliers profiled are new to this series; none appeared in the June 4 roundup.

Wool Pile & EPDM Seal Strips

1. Daoseal (Zhejiang) — Pile Weatherstrip Specialist

Daoseal is a Zhejiang-based manufacturer with 20+ years of OEM/ODM experience in pile weatherstrips and door seals. The company serves buyers in the USA, Canada, and Australia and offers a full catalog of self-adhesive, groove-insert, and fin-pile variants for aluminum sliding windows.1 Key details:

Products: Self-adhesive pile weatherstrip, aluminum-profile-carrier brush seals, standard & fin-pile variants for aluminum sliding windows and casement doors
MOQ: Negotiable (OEM/ODM service available; free quote within 12 hours per site)
Pricing: Inquiry basis; competitive on volume orders
Certifications: Not publicly disclosed; factory-owned production with in-house workshop
Export markets: USA, Canada, Australia

Pile weatherstrip being installed on an aluminum sliding window frame — Daoseal pile weatherstrip installation on aluminum sliding window 1

2. Tongxiang Liansheng Plastic Products Co., Ltd. (Zhejiang) — Diamond MIC Member

Founded in 2007 and listed on Made-in-China.com as a Diamond Member with Audited Supplier status, Tongxiang Liansheng (Jiaxing, Zhejiang) is a well-established factory covering both pile weatherstrips and EPDM/TPE/PVC rubber seal strips.2 Two production workshops handle injection and extrusion parts respectively.

Products: Wool pile weather strips (normal, silicone, fin-type, adhesive, customized), EPDM seal strips, TPE seal strips, bottom door brush seals, PVC/UPVC profiles for sliding windows
MOQ: Typically 5,000–10,000 m for pile strips; 2,000–3,000 m for rubber seals; 1,000 pcs for door brushes
Pricing: Pile strips ~$0.01–0.30/m; silicone variants ~$0.017–0.23/m; door brush seals ~$0.60–0.85/pc
Certifications: Verified business license (MIC Diamond); no ISO listed publicly
Export markets: North America, South America, Eastern Europe, Oceania, Middle East, Western Europe
Terms: FOB, CFR, CIF; T/T payment; OEM/ODM and factory tour available

3. Haining JINYI Door & Window Accessories Co., Ltd. (Zhejiang) — ISO-Certified Pile Strip Producer

JINYI is a Haining, Zhejiang factory specializing in ISO-certified pile weatherstrips with a broad catalog that includes straight pile, felt pile, mohair glass door seals, window brush seals, and anti-corrosion variants. The company positions itself as a high-quality customization specialist.3

Products: Straight pile weather strip, felt pile weather stripping, mohair seals, sliding door brush weather seals, wool pile window weather stripping, anti-corrosion pile weatherstrip
Certifications: ISO (confirmed)
MOQ / Pricing: Request-for-quote basis; competitive wholesale pricing
Export focus: Global export; OEM/ODM customization available

Aluminum Corner Keys / Angle Connectors

4. Foshan Xuanqing Zhilian Technology Co., Ltd. (Guangdong) — Specialist Corner Connector Manufacturer

Based in Shishan Town, Nanhai, Foshan (Guangdong), Xuanqing Zhilian focuses on aluminum corner joints and angle connectors for aluminum window and door frames. Their catalog spans injection-gel connectors, 45°/90° die-cast connectors, profile connectors for mullion systems, and heavy-duty sliding door corner braces.4

Products: Injectable gel aluminium corner joint; die-cast 45° straight-slice aluminum corner connector; 6063-T5 aluminum door/window angle corner joint (14×36 mm); middle column connector; modular corner joint for sliding doors; glue-injected corner brackets with screws
Certifications: Not publicly listed; client base includes Germany, Australia, Iraq, Europe
MOQ / Pricing: Inquiry-based; export-oriented with multiple regional market segments
OEM: Supported

5. Ningbo Minde Technology Co., Ltd. (Zhejiang) — Profile Connection System Specialist

Minde Technology (Ningbo, Zhejiang), under the JDA Corporation group, manufactures aluminum angle connectors and corner brackets for structural aluminum profiles — covering angles from 20° to 90° in a 38-product range, with SGS-RoHS test certification on record.5

Products: Alu Connection Angle 20/30/40/45/90° (part nos. 2501.xxx series); T-slot floor elements; profile end caps; solar mounting components; profile sliders and rollers
Certifications: SGS-RoHS (SHAEC22002232201 on file); Environmental/Health/Quality system certifications visible
MOQ / Pricing: Inquiry basis; competitive on standard sizes
Export: English and Spanish websites; international distribution

Aluminum connection angle 45° bracket product shots from Ningbo Minde — Aluminum angle connector (Alu Connection Angle 45°) by Ningbo Minde Technology 5

Sliding Window Pulleys / Rollers

6. Guangdong Sihai Hardware Precision Manufacturing Co., Ltd. (Guangdong) — Roller & Pulley Manufacturer

Sihai Hardware (SH brand, Guangzhou shipping port, Guangdong) manufactures stainless steel and PVC sliding door and window rollers with a zinc-plated hardware bracket design. The company emphasizes custom OEM production with a 10-day sample turnaround.6

Products: SH-R101 / SH-R102 / SH-R103 series single-wheel sliding window rollers; aluminum and PVC-frame bearing roller pulleys; door and window roller wheels for hotels, apartments, bathrooms
Materials: Stainless steel, iron, POM, nylon
MOQ: Customizable
Pricing: Inquiry basis (12-hour response time)
Certifications: ISO 9001 International Quality System Certificate; China Quality Credit Certificate 6A+; Contract-Keeping & Integrity Patent Right certificate
Shipping port: Guangzhou, China
Payment: 30% deposit, 70% balance before delivery by T/T; delivery 20–25 working days

Sihai Hardware SH-R103 zinc-plated single-wheel sliding window roller — Sihai Hardware SH-R103 single-wheel sliding window roller with zinc-plated bracket 6

Aluminum Profile Assemblies & Multi-Category Hardware

7. Top Aluminum Import & Export Co., Ltd. (Foshan, Guangdong) — Architectural Profile & Hardware Exporter

Foshan-based Top Aluminum is a multi-product exporter covering architectural aluminum profiles, window/door systems, pulley hardware, and curtain wall sections. Their profile range includes sliding window roller pulleys, and the company holds ISO, CE, and SGS certifications visible on product listings.7

Products: Sliding window/gate roller pulleys, aluminum windows & doors, glass curtain wall profiles, architectural aluminum extrusion profiles, aluminum tube for door frame, top-hung window systems
Certifications: ISO, CE, SGS (confirmed from product imagery)
MOQ / Pricing: Inquiry-based; customized profile services available
Export: International distributor network; factory website states ongoing product updates — buyers advised to contact directly for current pricing

8. Sichuan Jiayueda Building Materials Co., Ltd. (Sichuan) — EPDM Rubber Strip Factory

Jiayueda (Chengdu, Sichuan) is an Alibaba-listed manufacturer of EPDM rubber seal strips across a broad application range — including window and door sealing, car window weatherstripping, and EPDM foam rubber weather stripping. The company lists self-adhesive EPDM foam car window strips starting from $0.19–0.99/m with MOQ as low as 2 meters (retail/sample), scaling to industrial MOQ for bulk.8 Factory direct pricing and I-TYPE EPDM seal strips for construction machinery and building applications are highlighted.

Products: EPDM foam rubber weather strip (self-adhesive), EPDM foam car window and door rubber strip, I-TYPE EPDM rubber seal strip for construction/home appliances, EPDM corner joint sealing strip
MOQ: 2 m (sample); industrial bulk available
Pricing: $0.19–0.99/m (EPDM foam self-adhesive); industrial EPDM strips $0.76–0.90/pc (500 pc MOQ for corner joint variants)
Certifications: Inquiry basis
Platform: Alibaba-listed (Sichuan province)

Quick Comparison

Supplier	Location	Priority Parts	Key Certifications	Platform
Daoseal	Zhejiang	Wool pile seal strips	Factory-owned	Own website
Tongxiang Liansheng	Jiaxing, Zhejiang	Pile strips, EPDM/TPE seals, profiles	Diamond MIC, Audited	Made-in-China
Haining JINYI	Haining, Zhejiang	Pile strips (ISO-certified)	ISO	Own website
Foshan Xuanqing Zhilian	Foshan, Guangdong	Corner keys/angle connectors	Not listed	Own website
Ningbo Minde Technology	Ningbo, Zhejiang	Angle connectors (20–90°)	SGS-RoHS	Own website
Sihai Hardware (SH)	Guangdong	Sliding window rollers	ISO 9001, 6A+	Own website
Top Aluminum	Foshan, Guangdong	Rollers + profile assemblies	ISO, CE, SGS	Own website
Sichuan Jiayueda	Sichuan	EPDM rubber seal strips	Inquiry	Alibaba

Sourcing Notes

Pile strips: MOQ benchmarks range from 300 m (self-adhesive retail grade) to 50,000 m (silicone pile, UV-resistant bulk). For frame-slot groove-insert types used in aluminum sliding windows, expect 3,000–10,000 m as standard factory minimums at $0.01–0.30/m. Silicone or fin-pile variants command a premium ($0.17–0.50/m).

Corner keys: Angle connectors for aluminum window frames fall into two types — glue-injected corner brackets (suited for PVC/UPVC frames) and aluminum die-cast corner connectors (6063-T5 alloy, suited for aluminum casement and sliding systems). Foshan and Ningbo remain the dominant sourcing clusters for this category. Price for standard 45° die-cast connectors is typically $0.05–0.56/pc depending on size and quantity (from yesterday's covered suppliers; new suppliers require direct inquiry).

Rollers: Sihai's 10-day sample turnaround and customizable MOQ make them a good first-inquiry option alongside Ningbo Guoli (covered June 4). Zinc die-cast construction remains the dominant material for durability in commercial projects.

Thermal break profiles: Top Aluminum's product range includes thermal break aluminum extrusion profiles — buyers specifying broken bridge aluminum or 6063-T5 alloyed assemblies for energy-efficient fenestration projects should request their full profile catalog directly.

China Aluminum Windows Accessories Suppliers Roundup — June 5, 2026