 Crystalline technology is used to create hydrophobic concrete by causing crystal structures to form in the tiny capillaries, pores and other air pockets left behind in the concrete curing process.During this formation, by-products are left behind in the capillaries and pores of the freshly cured concrete, typically calcium hydroxide, sulfates, sodium carbonates, potassium, calcium, and hydrated and unhydrated cement particles.These crystal structures then plug the pores and capillaries, preventing water from flowing through them.