Multi-fin pile Weatherstrip Profile

What this profile class means

Profile family: Pile / brush seal
Profile subtype: Multi-fin pile
Common application context: window, door
Contact mode: sliding / wiping contact
Seal body: pile plus multiple barrier fins
Mounting interface: carrier / backing

Pile cross-section includes more than one continuous fin/barrier.

Common terminology that may lead to this class includes: multi-fin pile, bi-fin, tri-fin, quadrafin, five-fin. These terms are discovery clues only; they do not prove fit.

Identification order

1. Confirm the installed location and motion: higher-control sliding interfaces.
2. Identify the mounting/receiver interface before judging the outer body shape.
3. Inspect an end-view cross-section and note orientation, mirrored/asymmetric features, fibres, chambers, leaves/flaps, carriers, or fasteners as applicable.
4. Measure the critical fields below using the the measurement datum and tool-resolution rules and preserve uncertainty.
5. Compare only against records with compatible interface geometry. Treat visual similarity as a clue, not as compatibility evidence.
6. Keep product identity and replacement fit as separate claims under this evidence policy.

What to measure

• backing width — capture as an observed/measured field; do not invent a value.
• pile height — capture as an observed/measured field; do not invent a value.
• fin count — capture as an observed/measured field; do not invent a value.
• fin positions — capture as an observed/measured field; do not invent a value.
• orientation — capture as an observed/measured field; do not invent a value.

Also record the measurement tool, resolution, repeated readings where practical, sample condition, original reported value/unit, and measurement notes. If a critical field cannot be measured safely or reliably, leave it UNMEASURED rather than guessing.

What not to infer

Brand names and fin counts do not establish fit; dimensional evidence is still required.

Additional guardrails:

• Do not infer brand/model compatibility from a family name or silhouette.
• Do not infer a universal dimension from terms such as “kerf,” “T-slot,” “pile,” “bulb,” “sweep,” or “felt.”
• Do not infer material composition unless it is marked, directly observed at the generic class level, or source-backed.
• Do not publish a fit/supersession statement without explicit authoritative evidence for that relationship.

Evidence and provenance

This page uses source-backed profile taxonomy, measurement rules and evidence boundaries. The site structure does not broaden the scope of the cited sources or establish exact replacement fit.

• 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 — 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.

Useful next steps

• Pile & Brush Weatherstrip Profiles — Profile family
• Measure Pile Weatherstrip — Measurement guide
• Window Weatherstrip Identification — Application guide
• Door Weatherstrip Identification — Application guide
• Weatherstrip Terminology Guide — Terminology guide
• Weatherstrip Identification Methodology — Methodology

Integration note

Use the Weatherstrip Reference exactly as written. Do not create an alias page for the common terms above. Any original illustration used on this route must remain labelled “Reference graphic — schematic, not exact product depiction” unless a later exact record binds geometry to evidence.