Expansion Joints Waterbar v-200mm,25m

​Definition: A flexible or rigid strip of impervious material (like PVC, rubber, or hydrophilic compounds) that is embedded within a concrete joint during construction. ​Function: Its primary purpose is to act as a watertight diaphragm or seal to prevent the passage of water or other fluids through the gaps that naturally occur at construction joints, expansion joints, and contraction joints between different concrete pours. ​Mechanism: It works by creating a winding path that water must travel, which is generally more complex than the joint itself, or, in the case of hydrophilic types, by swelling upon contact with water to seal the gap.