Window tilt latches, weatherstripping, plastic window sash cover

Hi there! Please see our 26-317 Certainteed brand tilt latch pair. I believe this is exactly the latch you were looking for.

As for the weatherstripping, it appears to be a kind of wool pile. I don't know what size you need so for now I recommend browsing our complete selection here. We list detailed dimensions for each product that you can use to pick the best one for the job.

Lastly, we do not sell sash covers of any sort. I am sorry for the inconvenience. 

Thanks for confirming. That would be because of the spring balances, then. These are located on either side of the window frame. I'll need photos of your current setup so that I can advise further. Seeing them out of the window would be ideal, just like you showed the other parts in your first post.

26-353 will not solve this problem, no. All that does is let you tilt the window in for cleaning and removal, it doesn't have anything to do with keeping it up. Balances are much more complicated mechanisms so you should brace yourself now for having to do some homework on this. Depending on what I see this may or may not be a project.

Awesome! Glad you got it settled. Please let me know if you had any further questions or if you run into a different issue, I'd be happy to help.