The manufacturer now has a full line of admixtures to ensure that structures are watertight. Sika 1+ is an integral, pore- blocking, hydrophobic liquid admixture. Sika Watertight Powder is a ViscoCrete- powered, water-reducing, pore-blocking hydrophobic powder. Sika WT-215P is an integral, powdered crystalline-based permeability reducing admixture. Sika Corp. WOC Booth N1827