Hello,
I have a Certainteed window that needs its bottom weatherstripping replaced. I placed an orderfor your 5' Dual-durometer Weatherstrip (58-164-5) because the dimensions matched. The product seemed like a good fit (see attached photo) but unfortunately I think the T is too rigid. The original weatherstripping is rubbery and can easily be pressed into the groove.
I took the window off and tried to slide the weatherstripping in, but I couldn't get more than a few inches due to the friction. When I took the weatherstripping back out, the T had deformed into a Y. I tried getting half of the T in, and pressing the other half in with a putty knife, but that didn't work either. I think the T is just too wide for the groove.
Do you have any other ideas? I'm having trouble finding a T slot weatherstripping replacement for this window. The original weatherstripping is failing (the edges have fallen off) and water is getting inside.