Caulk may lose its initial adhesion and flexibility, which will cause it to crack or pull away from the surfaces to which it is applied.

What Causes It?
Using a lower-quality caulk can cause it to crack and pull away from the surface. Also, using the wrong type of caulk for a particular application may cause it to fail. An example of this would be using latex or vinyl caulk in areas where there is prolonged contact with water or considerable movement of the caulked surfaces.How to Solve It
Use a top-quality water-based, all-acrylic, or siliconized acrylic caulk if you do not anticipate prolonged contact with water. These caulks are flexible enough to adapt to minor fluctuations in the substrate, stretching in gaps that widen slightly over time.They also adhere to a wide range of interior building materials, including wood, ceramic tile, concrete, glass, plaster, bare aluminum, brick, and plastic—even in areas where moisture is present.

Note: Silicone caulk should not be painted.

Note: Images provided by The Rohm & Hass Paint Quality Institute.