Quick answer. A 400 Series Perma-Shield casement or awning sash can present a top-edge waterbar and bulb-style sash weatherstrip. They have different manufacturer-described locations and attachment procedures. A top-edge strip should not automatically be ordered as perimeter bulb material. 12
Start at the location, then the attachment method
| What you are inspecting | Top-edge waterbar | Sash bulb weatherstrip |
|---|---|---|
| Where to look | The waterbar is along the top of the sash on the cited 400 Series Perma-Shield window. 1 | For the documented 1978–2019 sash, the bulb-style weatherstrip is the sash-edge seal described in Andersen's separate bulb replacement guide. 2 |
| What the source says about fastening | Andersen specifies vinyl-to-vinyl adhesive for the waterbar and notes that removing the sash is unnecessary for this task. 3 | Andersen describes the bulb strip being pressed into its channel without adhesive, with sash removal in that bulb service procedure. 2 |
| Ordering information | The manufacturer says some casement waterbars and awning waterbars are not currently available through its online parts store; its article directs the reader to seek a quote. 4 | Use the matching bulb-specific OEM replacement article and window-size evidence, not a waterbar catalog entry. 2 |
Important distinction: An adhesive-backed top waterbar and a channel-seated bulb are not interchangeable just because both touch the sash. The table describes documented service paths rather than an approval for any particular part on any 400 Series unit. 32
Inspection checklist
- Confirm 400 Series Perma-Shield and casement versus awning identity before comparing parts. Save a photo or unit-identification record; write down what remains unknown. 1
- Take a full-sash picture in a safe position. Then photograph the upper edge and the channeled sash edge as separate views. A close-up is more useful with a short note:
top exterior? / channel visible? / original attachment visible?. - If the damaged area is on the top, compare its location with the waterbar article. Do not assume a waterbar fits solely from shape, and do not cut away an uncertain part. 1
- If the damage instead follows a sash channel, compare with the 1978–2019 bulb-source layout and identify the exact period before choosing its procedure. 2
- For waterbar ordering, check Andersen's current quote/availability route rather than inventing a substitute product number. 4
After identifying the damaged component
Waterbar identified: record sash size and top-edge condition; the issuer's service text specifies a distinct adhesive method, but that is not permission to use general-purpose glue. 3 Bulb identified: preserve the channel and period evidence; the source describes a pressure-fit procedure and sash removal. 2 Still ambiguous: pause parts ordering and obtain issuer confirmation for the exact unit.
This page does not provide a universal waterbar SKU, cut length, adhesive substitution, seal performance guarantee, or fit rule for a 1966–1977 unit. Sharp tools, sash handling and access concerns require the full manufacturer safety instructions or qualified service—not an improvised repair based on this identification chart.
Sources and references
All footnoted manufacturer facts were checked against the original publisher pages on 2026-10-11. A source describing a product family does not prove a specific unit or replacement fit.
Andersen Corporation, Andersen Help Center 000004396 ©2026, Details; Installation; original issuer document (source consulted 2026-10-11).↩
Andersen Corporation, Andersen Help Center 000002456 ©2026, Details; Order Parts; Install Parts; original issuer document (source consulted 2026-10-11).↩
Andersen Corporation, Andersen Help Center 000004396 ©2026, Details; Installation; original issuer document (source consulted 2026-10-11).↩
Andersen Corporation, Andersen Help Center 000004396 ©2026, Details; Installation; original issuer document (source consulted 2026-10-11).↩