Salts must be in water to move through a porous building material via capillary suction. Due to the presence of the Dry-Treat sealer, the building material will repel the water and it also repel the dissolved salts in particular the very damaging chloride ions. Freeze-thaw is a phenomina that occurs when water fills up the surface pores of a porous material. When that water freezes due to below zero temperatures the water expands and may spall the surface. A sealer than can provide resistance to salt attack is also an excellent indication that it will protect a building material from freeze-thaw attack