This waterproofing material is a water-based rubberized asphalt coating waterproofing material made of water-based asphalt and a high-performance adhesion enhancer as the main ingredients based on special rubber with good elasticity. It is an indoor waterproofing material that is excellent in elongation and durability, is environmentally friendly due to its water-soluble property, is easy to apply by cold-formed application, and has excellent waterproofing performance