The seal should be tight and take some effort to get seated correctly.
Replace seal bottom of shower door.
Seals typically slide into a channel at the bottom of the door or they are placed between the base of the door.
Shower door bottom seal 2 pack glass shower door seal strip shower door seal frameless seal shower door stop shower leaks and create a water barrier 3 8 x 39 2 4 5 out of 5 stars 308 17 48 17.
Replacing shower door bottom seal is very easy.
If you will be replacing more than one door seal replace the bottom one first.
Remove the old sweep or seal clean the glass edge of the door use a glass safe scraper to remove any dirt or residue and clean with your favorite glass cleaner and a soft cloth.
When replacing the shower door bottom seal you will need to fully open the shower door to access the seal.
Install the seal onto the door by pressing one end of the seal onto the corner or end of the door and then pushing the seal into place from this end working your way to the opposite end.
See image below once the seal is removed you will need to clean the bottom of the shower door as hard water buildup is most likely on the bottom of the shower door.