Sika-4 Rapid Setting is a ready-to-use liquid for accelerating the set time of concretes and renders where low water pressure or slow water movement exists. It resists water pressure, prevents cement washout, and is suitable for mortars, screeds, and renders. This quick-setting admixture does not contain chlorides. Sika®-4 Rapid Setting is a chloride-free, quick-setting leak-stopping liquid that is mixed with water and ordinary Portland cement to produce a paste for leak-stopping against low water pressure infiltration and prevents cement washout. It can be used for rendering or concreting against low water pressures and for rendering and concreting in wet areas. PTDSIKDIRSK4RAP5