Sika 1 Waterproofing Admixture | Liquid Water Barrier for Mortar and Concrete
Sika®-1 is a ready-to-use liquid waterproofing admixture developed to improve water resistance in mortar and concrete applications. It reduces water penetration by filling capillary pores and micro-cracks in cement-based systems, creating an effective waterproof barrier.
The product can be used in both reinforced and non-reinforced concrete, as well as in mortar, screed, and plaster applications. It also provides effective performance on brick, stone, and concrete surfaces.
Application Areas
Sika®-1 is suitable for:
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Mortars, plasters, and screed applications
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Reinforced and non-reinforced concrete surfaces
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Brick, stone, and concrete structures
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Basements, swimming pools, tunnels, water tanks, manholes, and culvert applications
Product Features and Advantages
Sika®-1 provides the following benefits:
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Prevents water penetration by filling capillary cracks and voids
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Improves waterproofing performance of mortars and concrete
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Ready-to-use liquid admixture
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Easy application and solvent-free formulation
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Cures without shrinkage and does not require a primer
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Provides good chemical resistance and durability against different load conditions
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Resistant to water and water vapor penetration
Technical Information
| Property | Value |
|---|
| Chemical structure | Inorganic compounds + silicate mixture |
| Packaging | 6 kg / 30 kg plastic containers, 200 kg drums |
| Appearance / Color | Yellow liquid |
| Shelf life | 24 months in unopened packaging |
| Storage | Store between +5°C and +30°C, protected from direct sunlight and freezing |
| Density | ~1.0 g/cm³ |
| pH value | 10 ± 1 |
Dosage Information
Standard mixing ratio:
Sika®-1 : Water = 1 : 10
This corresponds to approximately 3% of the binder weight.
For applications where sand moisture content is high, the dosage can be increased up to:
A trial mixture is recommended before application to determine the optimum dosage.
Application Instructions
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Shake the container well before use.
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Slowly dilute Sika®-1 into the mixing water.
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Mix thoroughly and evenly into the concrete or mortar.
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Follow standard concrete placement and curing procedures.
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If required, it can be used together with other Sika products; preliminary compatibility testing is recommended.
Conclusion
Sika®-1 provides reliable waterproofing performance in cement-based systems where water penetration is a concern. With correct dosage and proper mixing, it creates a durable and long-lasting water barrier for both mortar and concrete applications. Its easy-to-use liquid formulation makes it a practical solution for professional waterproofing projects.