Remove existing caulking. Scrub thoroughly. If there is mold, spray with antifungal. Let dry thoroughly. Recaulk.
NO, worst thing you can do ! -strip ALL old caulk off and clean edges with lacquer thinner or acetone before re-caulking.
It is important to utilize caulk when changing shower fixtures to ensure that they are water proof. Often shower fixtures have small gaps or holes that water can leak into so caulk closes these. It creates a more pleasing finished look as well.
You can use 3m's caulk remover and a sharp razor blade.
This link gives pretty good instructions. http://www.ehow.com/how_1000545_recaulk-bathtub-tub.html
cut the opening on a 45 degree angle and caulk in drain
All types of showers can function with a bronze shower faucet. Just make sure that when installing the faucet, that you caulk all joints properly to prevent leakage.
My bathtub needs to be re-glazed. What are the steps one needs to take before bathtub re-glazing?
Caulk.
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If you have a menards or Home depo close by they sell a caulk like substance for repairs just like that.
Silicone caulk is your first line of defense, but that should be considered a stopgap fix only. Leaking shower walls implies a bigger problem - it should probably be checked out by a plumber. Letting it go could result in structural damage to your house.
a screw driver and hammer-be careful not to scratch the tile or a chisel or putty knife and a hammer- test it out and see what works best for you- you can also just remove half of it and re caulk to make it look clean