This D-profile weatherseal I think is much better than the flat weatherseal. I had flat stripping...This D-profile weatherseal I think is much better than the flat weatherseal. I had flat stripping around my front door, but I could still see light coming through the frame at certain areas (specifically near the bottom). I replaced the flat strips with the D-profile (i.e., tube) strip and ‘voila’, no light can be detected. The packaging states it will fill gaps from ¼” to 1/8”. It further states that it’s made of premium rubber foam, will harden, crack, or freeze, and retains its shape in sub-zero temps. Time will tell on those counts, but I’m happy with the results.
by reb177