If you have tile shower walls, there is a very good possibility that a leak could develop between the tile and the tub. Caulking the connection between your shower walls and tub prevents leaks and reduces mildew buildup. Caulking will help create a bond between dissimilar materials because it is both a strong glue and flexible sealant. In a damp environment of a tub or shower, the right caulk keeps the water where it belongs. Some caulking can even be used to match the color of your tile grout; like Ardex Color Caulking, designed to match their grout colors.
Caulks and adhesives are applied wet, then dry or cure in place to help you seal joints and seams in various structures such as showers, floors, walls, counter tops and even piping. Caulking can also prevent water damage inside and outside of the home when applied around faucets, ceiling fixtures, water pipes, drains, bathtubs and other plumbing fixtures.