Step 1
Turn off the water supply to the sink and unhook the sink from the water lines, drain and garbage disposal.
Step 2
Pry the sink loose from the countertop and have a friend help you remove it from the casing.
Step 3
Scrape away all the old caulking and plumber's putty with a scraper. You'll want the surface completely clean for reinstallation.
Step 4
Lay a fresh line of plumber's putty around the sink casing with a putty knife. Lay the plumber's putty on thick so that it bonds to the sink.
Step 5
Set the sink back into position.
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Step 6
Spray a bead of caulk around the entire sink. Make sure there are no gaps.
Step 7
Let the sink dry for 24 hours before reinstalling the disposal, drain and water lines and using the sink.