The caulking material is an essential material to seal the cracks in the building. Indoor, it can prevent water leakage from behind fixtures and ceramic tile walls; In the open air, it can prevent the weather and moisture from entering. In most of these applications, caulking is visible, and unless used neatly, it will stand out like a sore thumb. Fortunately, once you have learned the basic knowledge, it is not difficult to get it right.