Sika-4a Water Stop
Sika-4a Water Stop - 5L is backordered and will ship as soon as it is back in stock.
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Customer Services
Customer Services
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We're open from 8am to 5pm, Monday to Thursday, and 8am to 4:30pm on Friday.
Delivery and Shipping
Delivery and Shipping
Delivery is £12.50 + VAT to UK Mainland. Orders over £100.00 + VAT qualify for free delivery, except for certain products—these will be clearly shown at checkout.
Orders placed by 3pm (stock permitting) are dispatched the same working day on a next working day service (not guaranteed).
Some areas, like Northern Scotland, may take 2–3 working days.
Northern Ireland, Channel Islands and Isle of Man at extra cost – contact us for a quote
We're open:
Mon–Thurs: 8am–5pm
Friday: 8am–4:30pm
Call us: 0330 055 8210
Sika-4a Water Stop
Sika-4a Water Stop – rapid setting cement additive to stop leaks
Sika®-4a is a rapid setting water stopping cement additive. When mixed with ordinary Portland cement and water, it sets rapidly to seal areas of moderate water infiltration through concrete, rock or masonry.
Key benefits
- The benefits of Sika®-4a include, but are not limited to the following:
- 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
Typical applications
- 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
Technical information
| Property | Value |
|---|---|
| Pack size | 5L |
| Shelf life | 12 months |
Available sizes and packs
| Size | Sold as | Code |
|---|---|---|
| 5L | Each | 114454 |
Health and safety
Signal word: Danger (H314, H335). Read the Safety Data Sheet before use.
Payment & Security
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