Quick decision: Match the mounting interface first, then measure the cross-section. Similar outer shapes are not evidence that two seals are interchangeable.
Decision question
Is the mounting interface a push-in kerf or a slide-in T-slot?
Kerf / push-in stem
- A narrow stem/backing inserts into a groove.
- The seal body may be bulb, foam-clad, leaf/flap, or pile.
Measure or record:
- stem/backing width
- stem depth / retention geometry
- overall profile height
- body reach
T-slot / slide-in base
- A shaped base slides along a carrier slot.
- The body may be bulb or leaf/flap.
Measure or record:
- T-base width
- neck width
- slot throat/cavity where measurable
- overall profile height
Stop rule
A similar outer bulb or flap is not evidence of interchangeability. Confirm the receiver geometry before any fit decision.
Profiles to inspect next
- Kerf-in bulb — interface: kerf / push-in stem
- Kerf-in foam-clad compression — interface: kerf / push-in stem
- Kerf-in leaf / flap — interface: kerf / inserted base
- T-slot bulb extrusion — interface: T-slot / slide-in base
- T-slot leaf / flap extrusion — interface: T-slot / slide-in base
- Kerf-mounted pile — interface: kerf / push-in backing
How to verify your sample
Use the measurement guide for the geometry you can observe. If the mounting interface or a critical dimension differs, treat the profiles as different and stop before making a fit claim. Exact compatibility needs separate product- or application-specific evidence.
Provenance
- Source — Schlegel, Weatherseal products: Q-LON, pile & extruded seals — https://www.schlegel.com/products/ — supports: Compression foam gasket, brush pile, fin-pile, extruded-seal technologies; kerf/surface/carrier fitment distinctions.
- Source — Schlegel, Brush pile seals for windows, doors & shutters — https://www.schlegel.com/products/brush-pile-seals/ — supports: Woven vs extruded pile, optional fins, adhesive backing, sliding window/door applications.
- Source — Schlegel, Glossary — https://www.schlegel.com/glossary/ — supports: Compression seal/gasket, brush pile/weatherpile, carrier and threshold terminology; Aquamac as legacy name for Q-LON.
- Source — Ultrafab, T-Slot Extruded Seals — https://www.ultrafab.com/product/t-slot-extruded-seals/ — supports: T-slot as an insertion/interface family for extruded bulb profiles in window applications.
- Source — Ultrafab, Custom Plastic Extrusions | Profiles & Seals — https://www.ultrafab.com/product/custom-extrusions/ — supports: Distinct profile/interface labels including T-slot, kerf-mounted, leaf and multi-hollow bulb.
- Source — Ultrafab, Extruded Leaf & Flap Seals — https://www.ultrafab.com/product/extruded-leaf-flap-seals/ — supports: Leaf/flap as a legitimate extruded weatherseal profile family for window/door compression/sliding contexts.
- Source — Ultrafab, Pile Weatherstripping and Weatherseals for Windows & Doors — https://www.ultrafab.com/pile-weatherseals/ — supports: Pile, fin-pile, kerf-mounted pile and adhesive-backed pile categories.
- Source — Ultrafab, Multi-Hollow Bulb Seals — https://www.ultrafab.com/product/multi-hollow-bulb-seals/ — supports: Hollow/multi-hollow bulb compression body; T-slot, kerf and adhesive-backed interface options.
- Source — Pemko / ASSA ABLOY, PK52 Series Kerf-in Weatherstrip — https://www.pemko.com/en/products/gasketing/perimeter-gaskets/product-details-nm.aehpdp-pk52-series-ag_pemko_303063 — supports: Kerf-in bulb weatherstrip as a door/window compression profile.
This comparison uses the cited public sources and keeps terminology, observed geometry and exact fit as separate claims. The included schematic is original and intentionally generic.