Ardex A46 External Patching Rapid Drying Slump-Free Mortar Compound
Patch external concrete and walk on it in 2 to 3 hours. 2mm to 30mm in one hit, no slump.
ARDEX A 46 is a rapid hardening, rapid drying, slump-free cement mortar for external repairs to concrete floors, walls and stairs. Mix it with water, trowel it in and it sets in 15 to 20 minutes. Foot traffic after 2 to 3 hours at 20°C, floorcoverings after 24 hours.
Where to use it
- Repairing and resurfacing concrete stair treads, risers and subfloors
- Filling and patching cracks in walls, ceilings and around window and door frames
- Forming ramps and smoothing surfaces
- Dry or moist concrete, as long as it is set and hardened
Why waterproofers buy it
- Slump free. Made for holes and cracks in walls and ceilings, not just floors
- 2mm to 30mm in one application
- Sets in 15 to 20 minutes. Foot traffic after 2 to 3 hours at 20°C
- Floorcoverings after 24 hours
- 20MPa compressive strength at 28 days
- 20 kg bag mixed with 4.8 to 5.6 litres of water
- ARDEX 10 year product guarantee
Coverage
Approximately 1.4 kg of powder per mm per m². A 20 kg bag does about 14 m² at 1mm, 7 m² at 2mm or 2.8 m² at 5mm.
Not for
Heavy duty areas such as heavy vehicles or heavily trafficked areas, subfloor temperatures below 10°C or above 30°C, or coating before 2 days at 5mm and up to 10 days at 30mm.
Times at 20°C.
Trafficable after 2-3 hours
2mm to 30mm in one application
Slump-free mortar for external repairs to concrete floors, walls and stairs
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Ardex A46 External Patching Rapid Drying Slump-Free Mortar Compound
The Waterproofing Shop
22/872 Canterbury Road
Roselands NSW 2196
Australia
Product Details
How to Use
Technical Specifications
Frequently bought together
Technical overview
Key applications
- External repairs to concrete floors, walls and stairs
- Repairing and resurfacing concrete stair treads and risers
- Repairing and resurfacing concrete subfloors
- Filling and patching cracks in walls and ceilings
- Patching around window and door frames
- Forming ramps from 2mm to 30mm
- Smoothing surfaces before floorcoverings are installed
Surface suitability
- Concrete floors, walls and stairs (set and hardened, sound, free of dust, grease, oil and other surface contamination)
- Concrete stair treads and risers
- Concrete subfloors
- Dry or moist substrates (provided they are set and hardened)
- Worn or trafficked surfaces (abraded with a diamond grinder or scarifier)
Suitable for foot traffic and light duty, soft wheeled vehicle traffic only. Do not use for heavy duty areas such as areas subjected to heavy vehicles, or heavily trafficked areas. Subfloor temperatures must be a minimum of 10C and a maximum of 30C. Do not overwater; if the mix initially appears dry, continue mixing for a full 2 - 3 minutes rather than adding more water. Exterior installations must be protected from direct sunlight and draughts which could lead to accelerated drying of the surface. Hazardous chemical: may cause cancer, causes serious eye damage and skin irritation, may cause an allergic skin reaction and may cause respiratory irritation. Wear protective gloves, protective clothing, eye protection and face protection, avoid breathing dust and ensure adequate ventilation during mixing and application.
Calculate your coverage
You will need:
Ardex A46 External Patching Rapid Drying Slump-Free Mortar Compound
20kg bag
Total coverage: 0 m²
This is an estimate only. Add 10% for wastage.
Technical Specifications
| Product Type | Rapid hardening, rapid drying, slump-free mortar for external repairs |
| Composition | Graded sand, portland cement, calcium aluminate cement, calcium sulfate, calcium carbonate, silica fume and ethylene/vinyl acetate copolymer |
| Colour | Grey powder |
| Bulk Density of Powder | 1.3 g/L |
| Weight of Fresh Mortar | 1.8 kg/L |
| Relative Density | 2.6 approx. |
| Compressive Strength | 10MPa after 1 day, 15 MPa after 7 days, 20MPa after 28 days |
| Tensile Bending Strength | 10MPa after 1 day, 15MPa after 7 days, 20MPa after 28 days |
| Application Thickness | 2mm to 30mm in one application |
| Mixing Ratio | 4.8 - 5.6 litres of water to 20 kg of powder, or 1 volume of water to 3.5 volumes of powder |
| Working Time | 15 - 20 minutes at 20C |
| Set Time | Mixed mortar sets after 15-20 minutes |
| Foot Traffic | 2-3 hours at 20C |
| Floorcoverings | 24 hours |
| Coating Times | 2 days up to 5mm, 5 days up to 10mm, 7 days up to 20mm, 10 days up to 30mm |
| Coverage | Approximately 1.4kg powder/mm/m2 |
| Substrate Temperature | Minimum 10C, maximum 30C |
| Traffic Rating | Foot traffic and light duty, soft wheeled vehicle traffic |
| Pack Size | 20 kg |
| Shelf Life | 12 months stored in dry conditions in unopened packaging at 23C and 50% relative humidity |
| Hazard Classification | Hazardous chemical, non-dangerous goods; Poisons Schedule not applicable |
| * ARDEX publishes these as technical data with no test standard or accredited test report quoted | |
Frequently asked questions
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Where is A46 used?
CompatibilityA46 is a rapid-drying external patching mortar for repairing concrete, masonry, and screeds prior to waterproofing or tiling. It is suitable for balconies, podiums, and external decks.
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How fast does A46 cure?
PerformanceA46 is walkable in 2-4 hours and tile-ready in 24 hours, making it ideal for fast-track repairs and project schedules.
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What thickness can A46 be applied at?
InstallationA46 can be applied from 2mm up to 30mm in a single application, accommodating most repair and falls-correction work without shrinkage cracking.
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Is A46 suitable for external use?
ComplianceYes. A46 is specifically formulated for external applications with frost, weather, and UV resistance built into the cement formulation.
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Do I need to prime before applying A46?
CompatibilityYes. Prime the substrate with Multiprime or P51 before applying A46 to ensure full bond and prevent rapid water loss into the substrate.
Why trade professionals choose Ardex
Ardex is a global leader in high-performance building products, trusted by Australian trade professionals. The range spans liquid and sheet waterproofing membranes, primers, sealers, screeds and repair systems, engineered for lasting results on residential and commercial projects.
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