I have old wood windows from the 80-90's and the weatherstripping where it meets the sash is worn out.

I've removed one and it appears to fit in a channel and pressed in (by hand), but I am unable to find an exact replacement.

I would appreciate some suggestions on what keywords to search for online.

These are cheap windows and I have used peel and stick foam weatherstripping, but I'd like to repaint the bottom of the window and replace the weatherstripping, so it's done right.

Thank you in advance!

"Window kerf weatherstrip" and/or "compression bulb weatherstrip" should get you there.

You can go to www.strybuc.com , they are a supply house for all kinds of window and door replacement parts. Not sure if they sell to consumers or if you'd have to set up an account with them. You will be able to identify the component you are looking for so you can possibly then find it on amazon. Lowe's, Home depot, Menards etc. all carry some small quantities of various replacement material but they generally don't have much of a selection.

Fair warning, there are a lot of different kerf mounted weatherstrips. You didn't indicate if yours was, pile, bulb, foam filled buld or rigid fin. Amesbury, Schlegel (owned by Amesbury ) and Ultrafab are the big 3 when it comes to weatherstrip, but there are other small players.

Ken

Windows from the 80's-90's aren't "old" yet, and if you look at the edges of the sashes or in the corners of the glass, you may find manufacturer info. Especially if the sashes tilt. It's a possibility, and then you can typically get free replacement weatherstripping.

If not, the previous responses sum it up.