Sika Proof Liquid Waterproofing Admixture Is A General Purpose, Ready To Use, Economic Waterproofing Admixture For Mortars And Concretes. Ideal For Use On Swimming Pools, Water Tanks, Ponds, Below Ground Concrete, As Well As For Render And Floor Screeds For Water Resistant Applications. Sika Proof Improves The Impermeability And Absorption Characteristics, As Well As Increasing Resistance To Freeze Thaw Cycles. Sika Proof Also Reduces The Passage Of Efflorescence.