Sika® Astar is a one part, multi-purpose, acrylic co-polymer based dispersion used to prime and seal concrete or mortar substrates prior to underlayment mortar application.
Suitable for use in hot and tropical climatic conditions.
- Effectively seals concrete surfaces in a single, economic operation
- Preventing water loss into the substrate and bubbles forming in the leveling material, reducing absorbency
- Improving adhesion on smooth and sound substrates
- Useful for internal or external applications and wet areas
- Low consumption / high coverage
- Compatible to many substrates
- Easy to apply