Sika 4a Waterstop 5l

Sika 4a Waterstop is a rapid-setting waterproofing admixture that comes as a ready-to-use liquid. When mixed with ordinary Portland cement and water, it forms a quick-hardening paste that stops active water infiltration. Common uses include sealing active leaks in concrete, masonry or rock; preliminary waterproofing before applying further waterproof coatings, and emergency repair situations where a fast seal is needed. Sika 4a is also chloride and solvent-free, making it suitable for jobs where chloride exposure might be a concern (e.g. reinforced concrete).

• Ready-to-use clear admixture
• Highly efficient in creating a waterproof barrier
• Just mix with Portland cement: typical mix is ordinary Portland cement with Sika 4a and water to create a leak-stopping paste
• Rapid setting: Significantly accelerates cement/mortar setting times
• Supplied in a 5-litre container for large scale projects
• Chloride-free & solvent-free: good for situations where where you don’t want chloride exposure