Waterproof Concrete

Crystalfix migrates into and fills micro-voids with insoluble crystals to waterproof concrete by minimising entrapped water from the substrate.

When water freezes, it expands about 9 percent in volume. When water in moist concrete freezes it produces pressure due to this expansion within in the pores of the concrete. If the pressure developed exceeds the tensile strength of the concrete, these voids will dilate and rupture. The accumulative effect of successive freeze-thaw cycles can eventually cause expansion and cracking, scaling, and crumbling of the concrete.

Spalled and loose concrete should be removed from the area to be treated. For minor and shallow works, the area can be wetted and a light coated of Crystalfix applied. For more significant spalling, clean and patch with mortar mix first, the add a coat of Crystalfix over the treated area to a depth of 2mm or as required.