How to fix broken seal on sliding glass door?

There are a few different methods you can use to fix a broken seal on a sliding glass door. The first option is to use silicone or clear silicone caulk to repair small seal damage. You will need to clean the surface of debris before application, and apply multiple layers depending on the severity of the damage.

You can also use an acrylic latex-based sealant to re-seal the damaged areas of the door, but this may require more work and should only be used if the damage is more severe. If the damage is too significant, you may need to replace the entire seal.