Description
Sika’s Davco Davelastic is an acrylic polymer additive mixed into a cement-based tile adhesive to lift its flexibility, strength and water resistance beyond what a standard cement mix delivers on its own. That combination is what makes it suited to submerged tiling, building facades and high foot traffic areas, all places where a plain cement adhesive is more likely to fail under movement or repeated wetting.
It’s used across both interior and exterior tiling work, diluted with water at a 1 to 1 ratio before being worked into the adhesive mix. Because it’s an additive rather than a standalone adhesive, the base tile adhesive still does the primary bonding — Davelastic modifies how that adhesive behaves once it’s cured, rather than replacing any part of the mix.
Technical Specifications
| Product type | Acrylic polymer additive for cement-based tile adhesive |
|---|---|
| Appearance | White liquid |
| Dilution | 1 part Davelastic to 1 part clean, potable water |
| Packaging | 1 litre or 5 litre jerry can, or 20 litre pail |
| Shelf life | 12 months from manufacture, unopened |
| Storage conditions | Dry, cool conditions, out of direct sunlight |
Where to Use
- Submerged tiling, such as pools and water features
- Building facades exposed to weather and movement
- High foot traffic tiled areas, commercial and residential
- Interior and exterior cement-based tile adhesive systems
- Jobs where a standard cement adhesive’s flexibility and water resistance need lifting without changing the base adhesive
- Any of Davco’s range of cement-based tile adhesives and grouts, where extra performance is called for
How to Apply
- Prepare the substrate — it must meet the relevant standard for the job, structurally sound, dry, clean and free of contaminating material. Thoroughly clean old surfaces before starting.
- Dilute — mix Davelastic with clean, potable water at a 1 to 1 ratio.
- Add to the cement adhesive — use the diluted Davelastic in place of the mixing water for the chosen Davco tile adhesive, following that adhesive’s own ratio for the amount of liquid required.
- Tile within the working time — respect the pot life, open time and adjustment time of the resulting adhesive mix.
Because Davelastic changes the working properties of the base adhesive it is mixed into, check the pot life, open time and adjustment time against the finished mix rather than assuming they match the plain cement adhesive’s own published figures.
Important Notes
- Always dilute before use; Davelastic is not applied neat.
- Refer to the specific tile adhesive’s own datasheet for the exact ratio of diluted Davelastic to use as the mixing liquid.
- Store in dry, cool conditions out of direct sunlight for up to 12 months unopened.
