+**Caulk** is a flexible material, often a paste, applied to seal gaps and cracks in buildings and other structures. It forms a durable bond, preventing the passage of [Water](/wiki/water) and [Air](/wiki/air), thus improving insulation and protecting against environmental elements. This sealant maintains its elasticity, accommodating slight movement of the joined surfaces.
+## See also
+- [Sealant](/wiki/sealant)
+- [Adhesive](/wiki/adhesive)
+- [Weatherproofing](/wiki/weatherproofing)
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