In waterproofing engineering, “positive water pressure” refers to external water directly pressing against the building surface — such as rain impact or ponding on rooftops and exterior walls.
“Negative water pressure,” on the other hand, occurs when moisture infiltrates from behind the structure, pushing inward and causing seepage, efflorescence, or rebar corrosion — common in basements or balcony walls exposed to groundwater.

This video demonstrates GREENu’s waterproofing performance under both positive and negative pressure conditions.
Watch how our high-penetration structural waterproofing technology integrates seamlessly with concrete, addressing leakage at its root.

Whether it's external rainfall or internal seepage, GREENu gives you waterproofing you can trust — from every angle.