11 min read
When you specify an aluminum alloy door and window rubber seal strip company, you are not just buying a length of extruded rubber. You are investing in the long-term air tightness, water resistance, and energy efficiency of your entire building envelope. A poor seal strip—one that shrinks, cracks, or loses compression after one season—can turn a premium aluminum window system into a drafty, leaky liability.
At Jusen Doors & Windows Manufacturing Co., Ltd., we have manufactured high-end aluminum windows for over 20 years. We know exactly what a seal strip must do because we design and build the frames it goes into. We are not a trader who buys strips from a third factory and resells them. We are a vertically integrated manufacturer that engineers, extrudes, and quality-checks every meter of rubber seal strip in our own workshops. When you partner with us, you get a component that is guaranteed to fit, perform, and last—backed by the same quality system we apply to our complete door and window systems.
Whether you are a contractor sourcing for a villa development, a distributor building a product line, or a real estate developer requiring bulk supply, we provide OEM & ODM rubber seal strip solutions with stable lead times, flexible MOQ, and full after-sales support. Contact Our Team to discuss your project requirements.
The Advantage of Vertical Integration: From Frame to Seal
Most rubber seal strip suppliers only know rubber. They do not understand how the strip interacts with the aluminum extrusion’s geometry, the glazing gasket, or the hinge compression. That mismatch is the number one cause of field failures—seals that pull out of the channel, lips that do not compress properly, or strips that are too soft for the wind load.
Perfect Fit Engineering
Our independent design team works in-house with our aluminum window engineers. When we develop a new casement or sliding window profile, the seal strip channel, lip angle, and compression ratio are calculated simultaneously. This means the seal strip is not an afterthought—it is an integral part of the system.
For example, on our high-end casement windows, we use a hollow EPDM bulb seal that compresses exactly 1.5 mm when the sash closes. That specific compression ensures a perfect seal without over-stressing the hinge. A generic strip from a separate supplier would not match that geometry, leading to either air gaps or excessive closing force. Because we control both the frame and the seal, we guarantee 100% system compatibility.
Material Science and Quality Control
We do not use one “universal” rubber compound. We select materials based on the climate and application of your project.
- EPDM (Ethylene Propylene Diene Monomer): Our standard for most residential and commercial windows. Excellent ozone, UV, and weather resistance. Service temperature range –40°C to +120°C.
- Silicone: For extreme high-temperature environments (e.g., Middle East facades) or where fire-rated seals are required. Stable from –60°C to +200°C.
- TPV (Thermoplastic Vulcanizate): For recyclable, weldable corner joints in high-end sliding systems.
- PVC: For cost-sensitive interior applications where UV exposure is minimal.
Every batch we produce is tested in our own quality lab for tensile strength, elongation at break, compression set, and accelerated aging. We reject any compound that does not meet our internal standards—standards built from two decades of field data on real installations.
System Compatibility Guarantee
Because we manufacture the entire aluminum window system, we offer a guarantee that no separate rubber seal strip company can match: if the seal strip does not fit or perform as specified, we take responsibility for the entire system, not just the strip. This single-source accountability saves you time, money, and headaches on large projects.
Stable Bulk Supply for Global Construction Projects
For B2B buyers, nothing is more frustrating than a supplier who cannot deliver on time. A delay in seal strip delivery can halt an entire window installation schedule, causing costly labor idle time and project penalties. At Jusen, we have built our supply chain to eliminate that risk.
Raw Material Sourcing and Inventory
We maintain a strategic inventory of high-grade rubber compounds from certified suppliers. Our procurement team monitors global rubber prices and secures long-term contracts to stabilize costs. This means we are not caught off guard by market fluctuations. When you place an order, we already have the raw material on hand to start production immediately.
Precision Extrusion and Molding Capacity
Our factory operates multiple extrusion lines capable of producing complex profiles: hollow bulbs, sponge seals, magnetic strips, multi-lip weatherstripping, and self-adhesive tapes. We also have injection molding capabilities for corner-molded frames and grommets.
Because we own the tooling and production equipment, we can accommodate flexible MOQ on custom designs. A typical rubber seal strip company might require a minimum of 5,000 meters for a new profile. We can start with as little as 1,000 meters for prototype and trial orders, scaling up to bulk supply once the design is approved.
Our 20 years of solid wood processing and aluminum window production experience gives us a deep understanding of material behavior under different conditions. We know how rubber interacts with aluminum, glass, and sealants—knowledge that directly improves our seal strip designs.
Fast Lead Times and North America Logistics
We understand that construction timelines are tight. Our standard lead time for custom seal strip profiles is 15–25 days from sample approval, depending on complexity. For standard profiles we stock, we can ship within 7 days.
For clients in the United States and Canada, we leverage our North America overseas warehouses. By pre-positioning inventory closer to your job site, we reduce shipping time and costs. This is a critical advantage for large-scale projects where every day counts.
Our Aluminum Door and Window Rubber Seal Strip Range
We do not produce a one-size-fits-all strip. Our range is designed to match the specific requirements of different window and door systems.
For Casement and Tilt-and-Turn Windows
These windows rely on compression sealing. We supply:
- EPDM hollow bulb seals: Provide excellent compression and recovery. Used on our standard casement windows.
- Fin seals: Flexible fins that wipe against the frame for secondary sealing.
- Weatherstripping: Self-adhesive or mechanically fixed strips for perimeter sealing.
All our casement seals are designed to work with the multi-point locking systems we install on our aluminum windows. The seal strip compresses uniformly when the handle is turned, ensuring no gaps at the corners.
For Sliding Doors and Windows
Sliding systems require seals that handle friction and dust. We supply:
- Wool pile seals: Ideal for the interlock and top/bottom tracks. We use high-density polypropylene pile with a silicone-impregnated center fin for weather resistance.
- Brush seals: For bottom tracks where debris accumulation is a concern.
- Self-adhesive EPDM strips: For secondary sealing on the fixed panels.
These seals are standard on our high-end custom sliding doors used in villa projects. They are designed to minimize friction while maintaining a tight seal against wind and rain.
For Lifting and Sliding / Folding Doors
Large-span doors require heavy-duty seals that can handle high compression and frequent movement. We supply:
- Multi-chamber silicone profiles: Provide structural stability and thermal break performance.
- EPDM compression gaskets: Designed for the interlock between panels.
- Magnetic seals: For airtight closure on folding door systems.
These profiles are typically custom-extruded to match the specific gap dimensions of your system. Our engineering team works with you to develop the optimal profile.
Custom Profiles and Private Label
We support full OEM, ODM, custom size and design, and private label services. Send us a sample or a technical drawing of your existing seal strip. Our team will replicate it or propose an optimized version with better material or geometry. We can package the strips with your brand logo and part numbers for distribution.
Flexible Partnership: OEM, ODM, or Bulk Supply
We structure our partnerships to fit your business model.
OEM / ODM Customization
The process is simple:
- You provide a drawing, sample, or specification.
- Our engineering support and technical team reviews it and provides customized construction drawings within 24 hours.
- We manufacture a prototype sample for your approval.
- Upon approval, we produce the mold and begin mass production.
This service is ideal for window manufacturers who want a dedicated seal strip without investing in their own extrusion line.
Bulk Project Supply for Developers
For large-scale construction projects, we offer tiered pricing based on volume. Our self-built wood drying, spraying, and aluminum processing workshops are a testament to our large-scale manufacturing capacity. We can handle orders for hundreds of thousands of meters without compromising quality or lead time.
Distributor and Dealer Partnerships
We welcome global distributors and project partners. We provide marketing support, sample kits, and exclusive territory protection. If you are looking to expand your product line with high-quality seal strips, Reach Out to discuss a distribution agreement.
Ensuring Long-Term Performance with Full After-Sales Guarantee
A seal strip is only as good as its long-term performance. We test and guarantee ours.
Aging, Temperature, and Weather Resistance Testing
We conduct internal tests for:
- UV resistance: 1,000-hour accelerated weathering test (ASTM G154).
- Ozone resistance: 50 pphm at 40°C for 100 hours (ASTM D1149).
- Compression set: 25% deflection at 70°C for 22 hours (ASTM D395).
These tests ensure our seals resist cracking, hardening, and permanent deformation. We aim for a service life of 15–20 years, matching the lifespan of the aluminum frame.
Shipping Damage and Warranty Policy
We understand that rubber strips can be damaged in transit if not packed properly. We use professional packaging—coils or straight lengths with protective wrapping and edge guards. More importantly, we provide a full shipping damage after-sales guarantee. If the product arrives damaged, we replace it at no cost. This policy is part of our commitment to stable supply for global projects.
Technical Support During Installation
Field failures often occur because of improper installation: cutting the strip too short, not bonding corners correctly, or using the wrong adhesive. Our team provides installation guidance, including technical drawings and on-site support for large projects. Contact Us for detailed installation manuals.
Trusted by Global Contractors and Villa Developers
Our seal strips are used in projects worldwide. Here are two examples.
Case Study 1: High-End Villa Project in North America
A developer in California needed a complete aluminum window and seal strip solution for 200 luxury villas. The project required zero air leakage performance to meet strict energy codes. We supplied our custom casement windows with black EPDM bulb seals, designed and extruded in our factory. The result: perfect fit, passed all air and water infiltration tests on the first try, and the developer received a single-source warranty for the entire system.
Case Study 2: Commercial Building in Southeast Asia
A contractor in Thailand needed a cost-effective, high-temperature resistant silicone seal for sliding windows in a commercial tower. Our OEM service delivered a custom profile at a competitive price, with a short lead time of 18 days. The silicone seals performed flawlessly in the tropical climate, with no degradation after two years of service.
Frequently Asked Questions
What type of rubber seal strip do you use for your aluminum windows?
We primarily use high-grade EPDM and silicone (for extreme temperatures). Our 20 years of experience has proven these materials offer the best balance of flexibility, aging resistance, and sealing performance. We recommend the material based on your project’s climate.
Can you produce a rubber seal strip that matches an existing window profile?
Yes. We offer full ODM services. You can send us a sample or a technical drawing of your existing profile. Our independent design team will replicate or optimize it to ensure a perfect seal.
What is your minimum order quantity (MOQ) for custom seal strips?
Our MOQ is flexible. Because we own our production lines, we can accommodate smaller trial orders for custom profiles before moving to bulk supply for large construction projects.
How do you ensure the seal strips are not damaged during shipping?
We use professional packaging (coils or straight lengths with protective wrapping). Furthermore, we provide a full shipping damage after-sales guarantee. If the product arrives damaged, we will replace it.
I am a distributor. Do you offer private label packaging for seal strips?
Absolutely. We support private label services. We can package the seal strips with your brand logo and part numbers. Talk to Our Team to discuss your distribution agreement.
What is the typical lead time for a custom seal strip order?
For a new custom profile, allow 15–25 days from sample approval. For standard stock profiles, we can ship within 7 days. Our North America overseas warehouses can further reduce delivery times for US and Canadian clients.
Do you provide technical drawings for installation?
Yes. Our engineering team provides customized construction drawings within 24 hours of your inquiry. These drawings include installation details for the seal strip.
Decision Guide: Which Cooperation Model Is Right for You?
- Choose OEM/ODM if you are a window manufacturer or distributor who needs a custom seal strip that matches your existing profile. Send us a sample or drawing.
- Choose Bulk Project Supply if you are a developer or contractor with a large-scale construction project. We provide tiered pricing and stable lead times.
- Choose Distributor Partnership if you want to stock and sell our seal strips under your own brand. We offer private label and territory protection.
Stop sourcing components from separate suppliers. Get a complete, guaranteed solution from a manufacturer who understands the entire system.
Submit Inquiry for a formal quotation within 24 hours.
References
- ASTM D395 – Standard Test Methods for Rubber Property—Compression Set. ASTM International. https://www.astm.org/d0395-18.html
- ASTM D1149 – Standard Test Methods for Rubber Deterioration—Cracking in an Ozone Controlled Environment. ASTM International. https://www.astm.org/d1149-18.html
- ASTM G154 – Standard Practice for Operating Fluorescent Ultraviolet (UV) Lamp Apparatus for Exposure of Nonmetallic Materials. ASTM International. https://www.astm.org/g0154-16.html