1. Remove the old seal by sliding it out of the track or removing fasteners. Avoid bending the retainer.
  2. Clean the track channel so the new gasket slides smoothly.
  3. Slide the new seal into the track sleeve. Leave about 1 inch of overhang on both ends.
  4. Reuse existing screw holes if your door uses a screw-on retainer.
  5. Trim excess with a utility knife and lower the door to check for a continuous seal.

Helpful guides:
DIY installation and maintenance guide
Full step by step replacement guide