Soft-Hard Co-Extruded TPE Sealing Strip
This TPE sealing strip replaces vulcanized rubber and flexible PVC weatherstrip in door, window and curtain-wall assemblies without giving up elasticity or sealing force.
Dachang co-extrudes the soft-hard TPE seal strip in a single pass, bonding a rigid carrier (above 80A Shore A) to a soft sealing bulb (around 65A Shore A), so the strip clips firmly into the frame channel while the soft face compresses against the leaf to close the gap. Because it is a thermoplastic, every offcut and end-of-run is re-processable rather than scrap - the opposite of cross-linked rubber, which cannot be re-melted. Extrusion runs several times faster than rubber vulcanization, and the surface comes off the line smooth and dimensionally stable. For a sealing engineer, the practical result is one TPE extrusion sealing profile that carries both the structural mount and the weather seal, removing a separate retainer-plus-gasket build from the assembly.
Sealing Strip TPE Extrusion Profiles - Full Technical Specifications
Dachang produces these sealing strip TPE extrusion profiles by soft-hard co-extrusion, pairing a rigid carrier above 80A Shore A with a soft sealing layer near 65A Shore A in one continuous TPE weatherstrip.
Co-Extruded Layer Properties
| Property | Rigid carrier | Soft seal |
|---|---|---|
| Hardness (Shore A) | >80A | ~65A |
| Compression set (70°C, 24h) | 70% | 40% |
| Melt flow index | 20 g/10min 190°C · 5kg |
30 g/10min 190°C · 10kg |
| Base polymer | SEBS-based thermoplastic elastomer | |
| Bond | Fused at the die - no adhesive | |
Build & Supply
| Material | Thermoplastic elastomer (TPE), styrene / SEBS-based |
|---|---|
| Cross-section | Tooled to your drawing or sample - bulb, fin, P-, D-section, glazing wedge |
| Color | Standard black; color-matched on request |
| Weatherability | UV, ozone and heat-oxygen aging resistant |
| Temperature behavior | No deformation at elevated temp; stays flexible at low temp |
| Recyclability | Thermoplastic - offcuts re-processable |
| Resin cost basis | ~22 RMB/kg TPE resin (market-linked reference) |
Hardness, color and cross-section are tooled to your drawing or sample; the values above describe a representative soft-hard co-extruded build rather than a fixed catalog part.
Wholesale TPE Sealing Strip Profiles - Key Advantages for Project Buyers
Dachang supplies wholesale sealing strip TPE extrusion profiles to door, window and curtain-wall fabricators. Here is what the co-extruded build changes on the floor.
Two durometers, one strip
One co-extruded strip does the job of a carrier plus a separate gasket. The rigid layer above 80A Shore A holds the strip in the frame channel; the soft layer near 65A Shore A delivers the seal - fused at the interface during extrusion, not glued or clipped after. For your bill of materials, that deletes a part number and an assembly step: no separate retainer, no secondary gasket, no adhesive line to fail in the field.
Recyclable, plasticizer-free
The compound is a thermoplastic elastomer formulated without heavy metals or phthalate plasticizers. Offcuts and end-of-run regrind go back into processing instead of landfill, and the absence of migrating plasticizers means the seal will not bleed onto painted or anodized frames over time. For specs that carry low-emission or recyclable-content requirements, the material itself carries that story - and your scrap rate carries a lower cost.
Built for outdoor service
The strip resists UV, ozone and heat-oxygen aging, holds shape at elevated temperature, and stays flexible without cracking in the cold. Measured compression set on the soft layer is 40% (70°C, 24h), so the seal recovers rather than taking a permanent set after repeated closing. Across a facade's service life, that is the line between a seal that keeps closing the gap and one that goes hard and lets in air and water.
Dual-Durometer TPE Sealing Strip - Material Science & Weather-Resistance Engineering
Dachang builds the strip on a styrene / SEBS-based thermoplastic elastomer - the same broad family marketed as TPR on an SBS substrate, with the SEBS-based TPE chosen here for cleaner UV, ozone and aging behavior. Unlike cross-linked EPDM, it melts and re-flows, which is exactly what makes the soft-hard co-extruded seal profile possible: two melt streams at different hardness meet at the die and fuse into one profile with no adhesive interface to peel.
Melt flow is tuned per layer - 20 g/10min on the firmer carrier (190°C, 5kg) and 30 g/10min on the softer seal (190°C, 10kg) - which keeps cross-sections repeatable batch to batch at extrusion speeds several times faster than rubber vulcanization. The outcome is a dual-durometer TPE sealing strip with high elasticity and oil resistance that ages like a premium rubber but processes like a plastic.
~65A
Soft seal - Shore A
>80A
Rigid carrier - Shore A
40%
Compression set, soft (70°C/24h)
20/30
Melt index g/10min (firm/soft)
Project-Ready TPE Sealing Strip for Door, Window & Curtain-Wall Projects
Dachang's TPE door and window seals close the moving and fixed joints in a building envelope. The primary use is door and window weatherstrip - the soft face cushions the leaf against the frame, closing the gap against draft, dust, rain and noise while the carrier holds alignment through thousands of open-close cycles.
Doors & windows
Aluminum, uPVC and timber frames - glazing seals, leaf-to-frame weatherstrip, threshold and astragal profiles tooled to the system.
Curtain wall & facade
Gasket runs between mullion, transom and glass, where UV and ozone resistance decide how long the seal stays watertight.
Assembly cushioning
The soft TPE face absorbs tolerance and vibration in mechanical assemblies while keeping wear resistance and recovery.
Because the cross-section is tooled to your drawing, the same TPE compound runs bulb seals, fin seals, P- and D-sections and glazing wedges on one supply line - so a project can standardize on a single Dachang TPE weather seal supplier across every profile.
Have a cross-section drawing?
Send it to Dachang for a tooling proposal, first-article samples and per-meter pricing on your TPE sealing strip - no trading desk in between.
Custom TPE Sealing Strip Extrusion Profiles - OEM Manufacturing for Project Buyers
Send a drawing or a physical sample and Dachang tools to it. Custom sealing strip TPE extrusion profiles are produced from buyer-supplied cross-sections - bulb, fin, P-, D- or glazing-wedge geometry - with the hardness split set per zone across the soft-hard range, roughly 65A to above 80A Shore A.
Co-extrusion lets you combine durometers in a single strip, and color is matched on request (standard supply is black). No trading desk sits between your drawing and the line.
| TO QUOTE WE NEED | Cross-section drawing or sample, target hardness per zone, color, the frame system it seals, and annual volume. |
| YOU GET BACK | A tooling proposal, first-article samples for fit approval, then a repeatable extrusion sealing profile locked to your spec. |
| CHANGE CONTROL | Once approved, the profile runs to the same die and hardness on every release. |
Factory-Tested TPE Sealing Strip - Quality Control & Material Compliance
Dachang factory-tests every TPE sealing strip build against the properties that govern seal life - not just a visual pass.
Hardness
Shore A, per layer
Durometer checked on each layer to confirm the carrier (>80A) grips and the seal (~65A) stays compliant, so the strip fits the channel and still compresses.
Recovery
Compression set
Run at 70°C for 24h - 40% on the soft layer, 70% on the firm layer - to confirm the seal recovers after repeated closing instead of taking a permanent set.
Consistency
Melt flow index
Checked at 190°C so cross-sections stay dimensionally repeatable batch to batch and the profile fits the same frame on every release.
The compound is formulated without heavy metals or phthalate plasticizers, suiting low-emission and recyclable-content building specs. Test data for the properties above ships with the order; if your project requires third-party certification to a specific standard, flag it at the quoting stage so it can be arranged against your profile.
Bulk-Order TPE Sealing Strip - Packaging, Spooling & Shipping
Dachang ships TPE sealing strip coiled or spooled by length and cartoned for transport, with profile and length labeled to your PO. Strip can be supplied in continuous rolls or cut lengths to suit your line feed.
- Form: Continuous coils / spools, or cut-to-length
- Origin: Shipped from our Dongguan, Guangdong factory by sea or air
- Loading: Container loading planned to protect coil shape and maximize cube
- Programs: Scheduled releases against a blanket order keep your line fed without holding full volume on site
Sealing Strip TPE Extrusion Profiles - MOQ & Lead Times
MOQ and lead time depend on whether the profile runs on existing tooling or needs a new die.
- New profile: Tooling first, then first-article samples for approval, then production - quoted per cross-section
- Repeat profile: Shorter, set against your release schedule
- Pricing: Built on the current TPE resin cost basis (~22 RMB/kg, market-linked) plus cross-section weight per meter - a lighter section quotes lower per meter
- Send Dachang the drawing and target annual volume for exact MOQ, lead time and per-meter pricing.
Sealing Strip TPE Extrusion Profiles - Product Gallery
Dachang - Your Factory-Direct TPE Sealing Strip Manufacturer & Supplier
Dachang is a dedicated TPE sealing strip manufacturer and OEM supplier, extruding sealing and weatherstrip profiles from our own plant in Dongguan, Guangdong. Buying factory-direct means you talk to the people who cut the tooling and run the line - not a trading desk reselling someone else's extrusion.
As a TPE sealing strip supplier shipping worldwide, Dachang manufactures sealing strip TPE extrusion profiles to your cross-section and volume - send the drawing to start.
- In-house soft-hard co-extrusion - dual-durometer profiles made under one roof, not subcontracted.
- Material depth across TPE, TPV, PVC, PP, PE, POM and HIPS profiles - the right polymer matched to your seal, not just the one in stock.
- Drawing-to-strip tooling with first-article approval and repeatable per-spec production.
Sealing Strip TPE Extrusion Profiles - Procurement FAQs
Q: What hardness can the TPE sealing strip be supplied in?
A: Hardness is set per layer across the soft-hard range - roughly 65A Shore A on the soft sealing face up to above 80A on the rigid carrier, combined in one co-extruded strip. Dachang, as a TPE sealing strip manufacturer, tools the durometer split to your drawing, so the carrier grips the frame channel while the seal stays compliant.
Q: Is TPE sealing strip better than rubber or PVC weatherstrip?
A: For most door, window and curtain-wall seals, TPE delivers the elasticity and weather resistance of vulcanized rubber while processing like a plastic - faster extrusion, smooth surface, and full recyclability of offcuts. It is also formulated without heavy metals or phthalate plasticizers, so it will not bleed onto frames the way some flexible PVC can over time.
Q: What is the difference between TPE and TPR sealing strip?
A: They are essentially the same styrene-based elastomer family - TPE on an SEBS substrate, TPR on SBS - and the two names are largely a matter of regional and industry habit. For weather sealing, the SEBS-based TPE used here is chosen for its UV, ozone and aging resistance.
Q: Can you produce custom sealing strip TPE extrusion profiles to our drawing?
A: Yes. Dachang, as a TPE sealing strip supplier with in-house tooling and co-extrusion, produces bulb, fin, P-, D- and glazing-wedge profiles from a buyer-supplied drawing or sample. We return a tooling proposal and first-article samples for fit approval before production runs.
Q: How is pricing calculated for TPE extrusion sealing profiles?
A: Price is built on the current TPE resin cost basis (around 22 RMB/kg, market-linked) plus the cross-section weight per meter of your profile, so a lighter section costs less per meter. Send the drawing and annual volume for exact per-meter pricing and MOQ.
Q: What colors and packaging are available?
A: Standard supply is black, with colors matched on request. Strip ships coiled or spooled by length and cartoned, in continuous rolls or cut lengths to suit your line feed.