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Before - the external shell of the swimming pool was damp and showed lime and calcium stains.

After - Koster Blitzpowder with two coats of Koster NB1 slurry left a waterproof finish.

Koster waterproofing system

A resident of Double Bays exclusive Wallaroy Road had an extensive wine collection in a room built beneath his swimming pool. Despite adequate ventilation, the room had become damp, and water had started to run down the external shell of the pool within the room, with lime and calcium stains showing strongly.

The owner selected the Koster system to waterproof the room from the inside. The efflorescence was cleaned off, before Koster Blitzpowder was used to block the leaks a handful of powder held tightly against the water leak did the job. The area was primed and sealed with two coats of Koster NB1 slurry, leaving a dry, waterproof finish to the pool shell.

Despite the pressure of the swimming pool water and the recent rains, the room is still completely dry and the wine is back in place.