The decision this guide helps with: Two compressible Foam-Tite-looking strips may have similar exposed contact faces yet use different mechanical attachment. Before comparing an item code or a foam dimension, identify what holds the old strip in place. This is an observation worksheet, not an AmesburyTruth fit or substitution recommendation.
What to photograph before naming the part
On the installed frame, photograph the seal's contact face and, only if an undamaged end is already exposed, the boundary between the strip and the receiving frame. Record whether the strip runs along a sash, head, jamb, or another component. Do not peel a sound adhesive strip, pry a mounted retainer or force a sash to make a cross-section visible. If a loose offcut already exists, lay it next to a ruler in a separate picture; do not mistake its relaxed size for the installed closing gap.
Retention is a separate measurement from compression
| Visible observation | What it suggests | What it does not establish |
|---|---|---|
| Narrow projecting foot enters one straight kerf | A kerf-retained interface category may be involved | Which maker, part code, groove width or replacement fits |
| Backing has two lateral shoulders captured below a slot mouth | A T-slot style interface category may be involved | That every T-foot shares the same throat and shoulder geometry |
| Only soft foam/bulb face is exposed | Contact material and general shape may be described | How the hidden foot is retained |
| Detached foot is stretched, torn or flattened | Old specimen may have changed geometry | Original factory section or usable replacement dimensions |
Do not measure the gap by pushing the seal against the frame or closing a window on a caliper. If both a loose section and receiver are already safely accessible, record the loose foot width, shoulder spread, slot entrance width, foot projection and contact-face width as five separately labeled observations; mark any unseen dimension UNKNOWN. Use the same units for both photographs and sketches, and note that a compressed foam face is not an original profile dimension.
Troubleshoot the symptom before assuming the seal is wrong
If the strip repeatedly backs out in one area, record the location and whether the original foot has damaged shoulders, without gluing or pinching it into place. If closing effort increased after a replacement, document where resistance begins; an overly tall contact face, wrong retaining base, frame movement or another issue may be involved. If the assembly leaks while the strip remains seated, inspect whether the actual contact line is continuous before assuming that changing a Foam-Tite label will fix it. These are hypotheses to distinguish during professional review, not diagnoses.
Keep the AmesburyTruth numbers in separate columns
Prior project records mention 12025 and 12079 alongside different drawing dimensions. In this review those numbers are source-record identities only: their current issuer editions and application fit were not freshly authenticated. Do not label either as a proven kerf/T-slot equivalent, quote those old drawing dimensions as an installed opening, or infer a cross-model interchange. Confirm each drawing's labeled retaining-foot cross-section, document date, and intended system with the current supplier before purchase.
A useful six-photo inquiry for the actual supplier
- Wide photo of the whole window/door showing the sash and seal location.
- Close-up of the installed contact face and where it touches at closure, taken safely.
- Exposed end of the receiver, if already visible, without prying.
- Old detached offcut with ruler, showing base and contact face, if one exists.
- Any genuine frame label, service invoice or old package with readable exact code.
- Annotated sketch with observed dimensions, unit, and
UNKNOWNentries for hidden geometry.
Ask: “Which current manufacturer drawing and edition matches this foot plus this receiver, and what confirmed service part is specified for this exact assembly?” An apparent resemblance between catalog figures is insufficient. For rated, emergency-egress or otherwise regulated assemblies, use qualified authorized service and preserve all required ratings and operation.
Claim boundary: No current manufacturer service bulletin, installed-system identity, exact SKU interchange, compression rating, or fitting instruction is established here. This guide provides observable identification methods and supplier questions, not a part-compatibility certificate.