Hi Avner. You could purchase a pool noodle. Then sew a sleeve to put around it to use. You can purchase a no sew adhesive that you use a iron to join the material if you don't want to sew it. You could also make a sock like sleeve and add rice or bean to make a door draft stopper. Hope this helps.
Our 14 year old cord controlled blinds are all giving us trouble with raising and lowering and tilting. Many of the top mechanisms are coming unglued from the top. I ...
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DIY Draft Stoppers