Interlock weatherstrip is used on 400 Frenchwood®, 200 Series Narroline® and 200 Series Perma-Shield® gliding patio doors. The interlock weatherstrip consists of two (2) pieces: an operating interlock weatherstrip located on the operating patio door panel and a stationary interlock weatherstrip located on the stationary door panel.
If you need assistance identifying your window type, visit our Identify Your Product Guided Help Pathway. 
For assistance with locating weatherstrip and for patio doors manufactured prior to 1982, please Contact Andersen® Windows and Doors.
To order a replacement interlock weatherstrip, the size and exterior color of your gliding patio door are required. See Determine the Size of Your Andersen® Window or Patio Door for more information. Gliding patio doors with a White exterior use white interlock weatherstrip, and gray interlock weatherstrip is used for all other patio door exterior colors, including black.
When replacing the interlock weatherstrip, the head and sill plugs may also need to be replaced. See Replace Head and Sill Plugs on Andersen® 400 or 200 Series Gliding Patio Door.
200 Series PermaShield® Interlock Weatherstrip
400 Series Frenchwood® / 200 Series Narroline® Interlock Weatherstrip
Installation
To install an interlock weatherstrip on your gliding patio door, see Replace Interlock Weatherstrip on Andersen® 400 Series and 200 Series 2-Panel Gliding Patio Doors.
©2026 Andersen Corporation. All rights reserved.
