In tile and stone installation, speed and reliability are key. ARDEX 4×4 FAST Grey is a thin-bed cement-based adhesive designed to deliver high performance for both indoor and outdoor applications, on floors and walls.
What Is ARDEX 4×4 FAST Grey?
It’s a grey powder adhesive composed of cement, mineral fillers, synthetic resins, and selected additives. When mixed with water, it forms a smooth, flexible, fast-setting mortar suitable for a wide range of tile types and substrates.
Key Features
⚡ Fast Setting
- Open time: 30 minutes
- Working time: 70–90 minutes
- Ready for grouting within a few hours
🧱 Versatile Use
- Suitable for ceramic, porcelain, vitrified mosaics, and moisture-insensitive natural stone
- Compatible with underfloor heating systems
- For interior and exterior, wall and floor applications
🛠️ Adjustable Consistency
- Can be mixed to a thixotropic consistency (for walls) or semi-fluid (for floors)
- Recommended mix: 7–8 litres of water per 25kg bag
🌧️ Water and Weather Resistant
- Ideal for wet areas like bathrooms, kitchens, terraces, and balconies
- Compatible with waterproofing systems like ARDEX WPC
Substrate Preparation
ARDEX 4×4 FAST adheres to dry or damp substrates that are solid, load-bearing, and free of contaminants. For special substrates:
- Gypsum or anhydrite: use ARDEX P51 primer
- Non-porous surfaces: use ARDEX P82 (indoors) or ARDEX P4 (existing tiles)
Why Professionals Choose It
- Time-saving: fast setting allows quicker progression to grouting
- Easy to apply: smooth handling and excellent adhesion
- Certified quality: complies with EN 12004 and EN 12002
- Manufactured under ISO 9001 standards
Where to Buy
ARDEX 4×4 FAST Grey is available through official distributors across Ireland.