Remove silicone from tile by using a knife or razor blade to cut away any frayed silicone from the edges of tiles. Splash water on the silicone to loosen it and make it easier to cut away. Create a thick paste by using one cup of white flour and a few tablespoons of water until the right consistency is achieved.
Apply the paste and wait for the mixture to dry and adhere to the remaining silicone, then wash the paste off the tiles using water. The dried paste clings to the silicone, stripping it away from the tiles.
Silicone caulk is the best choice for surfaces that are exposed to water; it's long lasting, mildew resistant and watertight, and it doesn't fade or yellow over extended periods of time. Because silicone is water resistant, rubbing alcohol must be used to clean up any spills or drips on fingers or tubing during application. Silicone releases ammonia during curing, so any work involving silicone caulking must be done in a well-ventilated area.
Silicone is a chemical polymer that is created using a heating and refining process. It is produced in a number of forms, including liquids, gels, elastomers and solid forms resembling plastic. Its many forms are used in a variety of consumer products, such as adhesives, waterproof coatings and lubricants.