WP-100HD

Before any waterproofing treatment, conduct a 24-hour structural ponding test, filling the water up to the construction joint in the vertical wall area and repairing any leaks with PU grouting injection. For the primer coat, mix 1 part Obaproof WP-100HD with 3 parts water, then apply a thin layer of primer at 0.2kg/m². After 1-2 hours, apply the first coat of Obaproof WP-100HD (0.75kg/m²), even if the surface is wet but not ponding, stirring slowly with an electric mixer and adding up to 10% water if needed. For the second coat, stir the material again, ensuring the fibreglass net (if any) is fully covered by applying 1kg/m², and avoid exceeding 2kg/m/coat to prevent surface cracks and peeling. Allow the primer coat to cure for 1-2 hours, the first coat for 6-8 hours, and the second coat for 8 hours until fully cured, followed by a 24-hour water ponding test.