- Product Description
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DESCRIPTION
Sika-4a is a rapid setting waterproofing admixture. When mixed with ordinary Portland cement and water, it sets rapidly to seal areas of severe water infiltration through concrete, rock or masonry.
FEATURES AND BENEFITS
- Rapid setting for rapid leak plugging and/or fixing Ready to use, just add clean water and ordinary Portland cement
- Does not contain chlorides
- Solvent free
USES
- Sika-4a is used as preliminary waterproofing work on wet surfaces or where there is general infiltration of water, prior to the application of subsequent cementitious render or gunite. Typical applications are tunnels and culverts, mine galleries, water reservoirs, concrete pipes and manholes. It can also be used in quick setting mortar for assembly work, e.g. for fixing anchors, bolts and other fitting subject to early loading in rock or concrete.
APPLICATION INFORMATION
- Ambient Air Temperature - +5 °C min. / +35 °C max.
- Substrate Temperature - +5 °C min. / +35 °C max
SUBSTRATE PREPARATION
Surfaces to be treated with Sika-4a shall be thoroughly cleaned, roughened, and washed with fresh, clean water to remove any dirt, debris, loose, particles or contaminants. Level off any sharp surface protrusions. Cracks may need to be enlarged to increase the bond.
LIMITATIONS
- Only use with fresh ordinary Portland cement Setting times will be affected by ambient temperature, water and Sika®-4a temperature, supplier and age of ordinary Portland cement.
- Trials are recommended varying the Sika-4a water dosage, temperature and type of ordinary Portland cement until the required performance is achieved.
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