REMOVING SEALANT AROUND EDGES
Not the nicest of jobs, but it needs to be done to ensure a good job. Therefore remove the old sealant in the following way.
Cut the joint on both sides with a Stanley knife.
Remove difficult residues with a sealant scraper.
Slightly roughen the edge with a cleaning sponge.
Degrease the bath with household ammonia.
Tip: Let it dry properly. If necessary, slightly heat with a hair dryer.