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You can add Sika-1 Waterproofer to your concrete, mortar or render to create an effective water barrier. Use it when you need a normal setting liquid admixture to ensure render, masonry mortars, screeds, reinforced and unreinforced concrete, brick, concrete and stone substrates are impermeable to water.• Complex colloidal silicates swell and block water penetration into surface pores
• Suitable for internal and external tanking including basements, swimming pools, tunnels, water tanks, manholes and culverts