Summary

Our Petporte Smartflap is mounted in a door facing east, with the current eastern wind the amount of draft that gets by the flap is significant. Since this comes directly into our living room I made this plug, surround the shape with silicone rubber anti drift strip from the hardware store (4-7mm) and it should fit fine.

The grip part turned out to be a bit smaller then I thought, probably better make it 12mm instead of 10mm to get a 24mm wide opening for the fingers. See the scad file.