China Aluminum Windows Accessories Suppliers Roundup

Six verified Chinese manufacturers across all four priority accessory categories: EPDM/rubber seal strips, aluminum corner connectors, sliding window rollers/pulleys, and aluminum profile assemblies. Today's issue features new names not covered in previous issues.

EPDM and rubber seal strips

Ningbo Shenlian Rubber Sealing Elements Co., Ltd. — Ningbo, Zhejiang

Shenlian specializes exclusively in rubber sealing — EPDM extrusions, D-type foam gaskets, U-channel edge seals, silicone rubber seals, and co-extruded strips for doors, windows, and aluminum profile frames. The company has been a Diamond Member on Made-in-China since 2014 and carries Audited Supplier status. 1

Products: EPDM door/window seal strips (solid, sponge, co-extruded), U-channel aluminum-window seals, SGS-approved edge protector seals, rubber gaskets for aluminum profiles
Certifications: SGS (EPDM edge protector line confirmed); Diamond Audited MIC
MOQ: 300 m (standard lines); 3,000 m for SGS-approved edge protector grades
Price: $0.15–0.35/m FOB (depending on profile complexity and material thickness)
Export markets: North America, South America, Eastern Europe, Southeast Asia, Middle East, East Asia, Western Europe
Trade terms: FOB, EXW, CFR, CIF, DDP, DAP, FCA, CPT
Lead time: Within 15 workdays (both peak and off-season)

Shenlian's product catalog dedicates a separate group to "Aluminum Windows Rubber Seals," making it straightforward to source application-matched glazing gaskets without sorting through unrelated automotive lines.

Rubber seal strip extrusion manufacturing in a small Chinese factory

Rubber sealing strip production — typical setup for small-to-mid EPDM extrusion manufacturers in coastal Zhejiang and Guangdong.

Zhuhai Onaseal Technology Co., Ltd. — Zhuhai, Guangdong

Onaseal produces EPDM foam strips, PU foam strips, pile sealing strips, glazing weatherstrips, and rubber gaskets for aluminum door and window frames. The company holds Gold Member status on Made-in-China (since 2024) and is Audited. 2

Products: EPDM glazing gaskets (wedge-shaped and flat), EPDM foam weatherstrips, pile/brush sealing strips, PVC/TPE door strips, sponge rubber gaskets, car-door weatherstrip (cross-sell)
Certifications: Audited Supplier (MIC); business license verified
MOQ: 100 m (most standard lines); 3,000 m for bulk foam weatherstrip grades
Price: $0.07–0.15/m for window/door EPDM glazing gaskets FOB; $0.05–0.20/m for weatherstrip foam grades
Export markets: North America, South America, Eastern Europe, Southeast Asia, Africa, Oceania, Middle East, East Asia, Western Europe
Trade terms: FOB, EXW, CFR, CIF, DDP, DAP

Onaseal's lowest MOQ of 100 m on aluminum-window glazing grades is notably accessible for small-volume trial orders, compared with the 300–500 m floors common among larger Zhejiang and Hebei competitors.

Corner keys and angle connectors

Zhaoqing Kessy Hardware Co., Ltd. — Zhaoqing, Guangdong

Kessy is a full-range aluminum window and door hardware manufacturer covering corner connectors, sliding rollers, friction stays, window handles, flush bolts, hinges, and lock cylinders. The company is a Diamond Member (since 2019), Audited Supplier, and holds ISO 9001 and ISO 14001 certifications. It exports to more than 20 countries including the Middle East, Africa, the Americas, India, and Indonesia. 3

Products (corner connectors): Aluminum spacer-bar corner connection keys for double-glazing windows; custom aluminum profiles
Products (also offered): Sliding patio rollers (SS304, 26mm dia.), wool pile strips ($0.01/m, 10,000 m MOQ), friction stays (SS304/430), window handles, door handles, flush bolts
Certifications: ISO 9001, ISO 14001; Diamond Audited MIC; 5.0/5 buyer rating
MOQ (corner keys): 1,000 pcs
Price (corner keys): $1.50–2.00/pc FOB
MOQ (rollers): 1,000 pcs; price $1.57–1.73/pc (SS304 patio roller W-19SS)
Export markets: Middle East, Africa, Americas, India, Indonesia, and 15+ other countries

Kessy's strength is breadth: a single-supplier approach for corner keys, rollers, friction stays, and handles is viable here, reducing the number of vendor relationships needed for a standard aluminum window BOM.

Sliding window pulleys and rollers

Jiangxi Jin Bai Cheng Hardware Products Co., Ltd. — Ganzhou, Jiangxi

Jin Bai Cheng (JBC Hardware) is a dedicated roller and hinge manufacturer based in Jiangxi. It is a Diamond Member (since 2021), Audited Supplier, and has a 5.0/5 buyer rating. The core product lines are sliding door rollers, window rollers, wardrobe rollers, sliding gate rollers, and bearing rollers. 4

Products: Window rollers (aluminum body, nylon/steel wheel); heavy-duty sliding door rollers; UPVC window roller fittings; adjustable balcony door rollers; barn door hardware
Certifications: Diamond Audited MIC; business license verified
MOQ: 500 pcs (adjustable window rollers); 1,000 pcs (standard lines); 10,000–20,000 pcs (low-cost high-volume grades)
Price: $0.11–0.20/pc (standard window wheel/roller); $0.70–1.08/pc (adjustable heavy-duty balcony sliding roller); $0.80–1.20/pc (stainless steel heavy-duty door roller)
Export markets: North America, South America, Eastern Europe, Southeast Asia, Oceania, Middle East, East Asia, Western Europe
Trade terms: FOB, EXW, CFR, CIF, DDP, CIP, CPT
Lead time: Within 15 workdays off-season; up to 1 month peak season

JBC Hardware's catalog separates window rollers from door rollers and wardrobe rollers into distinct product groups, making it easier to filter aluminum-window–specific fittings versus furniture or interior door hardware.

Metal component machining in a Chinese hardware factory

Aluminum component machining — representative of the Jiangxi and Guangdong hardware factories supplying window roller and connector parts.

Aluminum profile assemblies

Guang Ya Aluminium Industries Co., Ltd. — Nanhai, Foshan, Guangdong

Guang Ya (Guangya) is one of China's larger aluminum extrusion manufacturers, operating from Foshan with a reported annual capacity of 500,000–700,000 tonnes/year, 70 extrusion lines (600–5,500-tonne presses), 10 casting lines, 7 powder-coating lines, and 11 anodizing/electrophoresis lines. Certifications include ISO 9001, ISO 14001, OHSAS 18001, CE, Qualicoat, Qualanod, and China Quality Mark (CQM). 5

Products: 6063-T5/T6 window and door extrusion profiles; curtain wall profiles; thermal-break profiles; standard sections (angles, channels, tubes); industrial and solar-frame profiles
Alloy grades: 6063, 6061, 6082, 6060, 6005, 6101, 6463
Surface treatments: Anodizing (10–25 µm), powder coating (PVDF/polyester >40–60 µm), wood-grain transfer, electrophoresis, mill finish, polishing
Standards: GB 5237-2008, ASTM B221, EN755, EN12020, JIS
Certifications: ISO 9001, ISO 14001, OHSAS 18001, CE, Qualicoat, Qualanod, CQM
MOQ: 5 tonnes EXW (LCL); 1 × 20'GP FOB (FCL)
Price: Inquiry-based (contact: peter.wong@guangyaal.com / WhatsApp +8613802463132)
Trade terms: FOB, EXW; supports 20'GP, 40'GP, 40'HQ, 45'HQ containers
Lead time: Die fabrication 7–15 days; production 15–20 days
Payment: T/T, L/C at sight

Guang Ya's combination of Qualicoat and Qualanod approvals is relatively uncommon among Chinese profile mills and directly speaks to European buyers who require coating quality certifications for architectural cladding projects.

Industrial metalworking and steel grinding in a manufacturing workshop

Metal fabrication workshop — Foshan-based aluminum mills like Guang Ya operate multiple extrusion and surface-treatment lines within the same production campus.

Hebei Guangte Rubber Products Co., Ltd. — Qinghe County, Xingtai, Hebei

Guangte is an EPDM and multi-rubber specialist established in November 2013, with 55 employees. It became a Diamond Member on Made-in-China in 2026 and holds ISO 9001:2015 certification. While Guangte's catalog skews toward automotive and solar-panel seal applications, its door and window EPDM line (U-type strips, weatherstrip composites, solid D/P/Z profiles) is directly applicable to aluminum window frames. 6

Products: EPDM U-shape weatherstrips for aluminum windows, co-extruded car/door seal strips, PVC garage door bottom seals, T-shape solar-panel gaskets, silicone shower seals
Certifications: ISO 9001:2015; Diamond Audited MIC (2026)
MOQ: 1,000 m (all lines)
Price: $0.16–0.30/m (U-shape/edge trim); $0.30–0.60/m (composite weatherstrip); $0.40–0.80/m (T-shape/solar panel gasket)
OEM/ODM: Yes; factory tour available

Guangte is worth noting for buyers who need both an aluminum-window weatherstrip and a solar-panel gasket from one source — its T-shape EPDM line for photovoltaic frames has become a secondary volume driver alongside the window application.

Supplier comparison at a glance

Supplier	Location	Category	MOQ	Price range	Platform tier
Ningbo Shenlian	Ningbo, ZJ	EPDM seal strips	300 m	$0.15–0.35/m	Diamond MIC (since 2014)
Zhuhai Onaseal	Zhuhai, GD	EPDM/foam seal strips	100 m	$0.07–0.20/m	Gold MIC (since 2024)
Zhaoqing Kessy	Zhaoqing, GD	Corner keys + rollers + full hardware	1,000 pcs	$1.50–2.00/pc (keys); $1.57–1.73/pc (rollers)	Diamond MIC (since 2019), ISO 9001/14001
JBC Hardware	Ganzhou, JX	Sliding window/door rollers	500–1,000 pcs	$0.11–1.20/pc	Diamond MIC (since 2021)
Guang Ya Aluminium	Foshan, GD	6063-T5/T6 profiles	5T EXW / 1×20'GP FOB	Inquiry	ISO 9001/14001, CE, Qualicoat, Qualanod, CQM
Hebei Guangte	Qinghe, HB	EPDM seal strips (window + solar)	1,000 m	$0.16–0.80/m	Diamond MIC (since 2026), ISO 9001:2015

Sourcing notes

Seal strips: Today's issue introduces two new seal-strip names. Onaseal (Zhuhai) is the most accessible entry point for small-volume sampling, with 100 m MOQs across most EPDM window grades — substantially lower than the 300–500 m floors set by Tianjin Haijinshu (covered June 8) and Shenlian. Shenlian's longer Diamond membership history (since 2014) provides a stronger audit trail for buyers who weight platform tenure in vendor selection.

Corner keys + hardware: Kessy (Zhaoqing) offers the broadest BOM coverage among corner-key suppliers covered so far, with corner connection keys, patio rollers, wool pile strips, friction stays, and handles all in one vendor. The $1.50–2.00/pc corner-key price is slightly above the $0.28–0.30/pc range seen at Foshan Xuanqing Zhilian (June 7), reflecting different product spec — Kessy's listing shows spacer-bar connection keys for insulated glass units rather than 45°/90° die-cast profile connectors.

Rollers: JBC Hardware (Ganzhou, Jiangxi) fills a geographic gap — most roller suppliers in previous issues were Foshan or Ningbo based. Its $0.11–0.20/pc standard window wheel price is competitive at scale (20,000 pc MOQ tier), while the 500 pc adjustable balcony roller entry point is workable for small hardware distributors.

Profiles: Guang Ya's Qualicoat and Qualanod certifications are the differentiating credentials in today's profile entry. Buyers shipping to the EU or to specifiers who require these coating quality marks can use Guang Ya as a drop-in alternative to the Foshan-focused profile mills covered in earlier issues.