If you work in fenestration, you already know: the humble glazing gasket and its adhesive backing can make or break a window system’s real-world performance. I’ve spent more site days than I care to admit measuring drafts with a smoke pencil, and the difference often comes down to compound quality, adhesive chemistry, and, frankly, vendor discipline.
From Qinghe County, Xingtai City (Xiangjiang Street South, Jinggangshan Road West), Pulongte’s aluminium window rubber glazing gaskets are a good example of where the segment is heading: consistent EPDM compounds, tighter tolerances, and peel-and-stick options that actually stay put through seasons. Many customers say installation speed improves noticeably—no surprise when the liner releases cleanly and the PSA “wets out” without fuss.
| Property | Spec (≈) | Notes |
|---|---|---|
| Polymer | EPDM, peroxide-cured | ASTM D2000 grade selection |
| Hardness | 60 ±5 Shore A | ASTM D2240 |
| Tensile strength | ≥7 MPa | ASTM D412 |
| Compression set | ≤25% (22 h @ 70°C) | ASTM D395, Method B |
| Temp range | −40°C to +120°C | Real-world use may vary |
| Adhesive options | Acrylic PSA / Butyl / Hot-melt | PSTC-101 peel test |
| Tolerance | ISO 3302-1 E2 | Profile dimensions |
Materials are compounded (EPDM + fillers + curatives), extruded, and vulcanized; adhesive lamination is applied inline with controlled nip pressure. After cutting/mitering, QC checks durometer (ASTM D2240), dimensions (calipers + optical), tensile (ASTM D412), ozone (ASTM D1149), and adhesion (PSTC-101). Mock-up sashes are often tested for air leakage (ASTM E283) and water penetration (ASTM E331). Typical service life: 10–20 years with periodic maintenance, depending on UV and cleaning chemicals.
| Vendor | Core polymer | Strengths | Certs (typical) | Lead time (≈) |
|---|---|---|---|---|
| Pulongte (CN) | EPDM | Custom profiles, adhesive options, value pricing | ISO 9001 | 2–4 weeks |
| 3M (Global) | PSA tapes | Adhesive science, liner tech | ISO 9001 | Stock–2 weeks |
| Trelleborg (EU) | EPDM/TPE | High-end profiles, co-extrusions | ISO 9001/14001 | 4–8 weeks |
| Regional OEM | EPDM/NBR | Localized support, small MOQs | Varies | 1–3 weeks |
Customization usually means profile geometry tweaks (bulb size, dovetail width), shore hardness swaps, or upgrading to acrylic PSA for powder-coat frames. To be honest, a quick mock-up saves headaches.
Bottom line: shortlist two or three window seal strip adhesive companies, demand recent test data, and run a representative mock-up. It seems obvious, yet it’s the step that catches problems before they’re on the punch list.