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Ardex X 77 Standard Grey - Microtec Fibre Reinforced Flexible Adhesive.
ARDEX X 77 is a premium, MICROTEC® fibre-reinforced, cement-based tile adhesive engineered for high-specification architecture and exacting installation standards. With an extended open time of up to 60 minutes and exceptional slump resistance, it delivers precise installation of large-format wall and floor tiles without compromise.
Designed for the demands of contemporary luxury surfaces — including fully vitrified porcelain, low-porosity slabs, glass and porcelain mosaics, and terrazzo — ARDEX X 77 meets BS EN 12004 C2 TE S1, classifying it as an improved, reduced-slip, extended open time adhesive with deformability for challenging substrates and environments.
Formulated for both interior and exterior specification, including swimming pools, spa suites, wet rooms and underfloor-heated floors, ARDEX X 77 develops rapid strength, allowing foot traffic and grouting from 90 minutes and full loading after 24 hours.
Key Advantages
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MICROTEC® fibre technology for elevated bond strength and dimensional stability
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Ultra-rapid set and cure — walk-on and grout in just 90 minutes
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Advanced double-T slump resistance — ideal for luxury large-format wall installations
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Compatible with porcelain, vitrified tiles, mosaics and terrazzo
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High yield — approx. 5.5 m² at 3mm
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Swimming-pool-grade durability — suitable for permanent immersion
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Internal & external rated, including underfloor heating and wet duty areas
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Designed for professional specification and premium fit-out environments
ARDEX X 77 unites luxury-grade finish expectations with engineering-class performance — the adhesive of choice where design intent and build integrity must both be assured.
| SKU | ARDEX-X77G |
|---|---|
| Colour | Grey |
| Bag Size | 20 kg |
| Mixing Ratio | 20 kg : 8.5 L water |
| Weight of Fresh Mortar | ~1.5 kg/L |
| Working Time (20 °C) | ~3 hours |
| Fixing Time (20 °C) | Up to 60 minutes |
| Adjusting Time (20 °C) | ~30 minutes |
| Open Time | ~60 minutes |
| Slip Resistance | < 0.5 mm |
| Tensile Adhesion Strength | > 1 N/mm² (all test conditions) |
| Transverse Deformation | S1 (≥ 2.5 mm and < 5 mm) |
| Application Thickness | 1 – 6 mm |
| Coverage | ~8 m² per 20 kg (8×8 mm trowel) |
