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The Port of Entry Facility at the Point Roberts Border Crossing was designed with good soil drainage, visquene (poly-ethylene plastic), and an 8-inch (200 mm) concrete slab on both the 1st and 2nd floor. However, hydrostatic pressure under the slabs forced excessive amounts of moisture to push through the concrete and affect the adhesion of the floor tiles on the entire first floor (below-grade) and areas of the second floor (on-grade). The floor tiles became blistered and adhesive seeped through the tile seams.
The floor tiles had to be removed to allow a slurry application of Krystol T1 followed by Krystol T2. The floors are now dusty dry and replacement flooring has been installed.
Krystol T1 is a surface applied crystalline slurry treatment that transforms new or existing concrete into a permanent waterproofing barrier.
