Ardex
Ardex P 51 Primer
The pink primer required under Ardex levellers and patches, sold in 1 gal and 4 gal sizes to match job size.
$124.60/ gal(options from $124.60 to $493.85)
Selected: Ardex P 51 Primer (1 gal) · 3.79 L
Ready for Markham pickup next business day
Free pickup in Markham (ready next business day) · GTA delivery $140
How much do I need?
sq ft
Specs
| Category | Adhesives & Primers |
| Size options | 1 gal · 4 gal |
| Unit sold | 3.79 L (1 gal) |
| Availability | Ready for Markham pickup next business day |
| Coverage | ~400 sq ft per gal |
| UPC | 709850209082 |
| Code | ARP51-04 |
How to use Ardex P 51 Primer
- 1Make sure the concrete is clean, dry and free of paint, sealers, curing compounds, or oil before priming.
- 2For standard absorbent concrete, dilute Ardex P 51 1 part primer to 1 part water by volume.
- 3For extremely absorbent or dusty concrete, use the "double-prime" method: dilute 1 part primer to 3 parts water for the first coat, then apply a second coat at 1:1.
- 4Roll or brush it on evenly — coverage runs about 400–600 sq ft per gallon depending on how absorbent the slab is.
- 5You’ll know it’s dry when the milky primer turns clear; drying takes a minimum of about 3 hours and up to 24 hours depending on temperature and airflow.
- 6Only apply your self-leveler, patch compound or adhesive once the primer is fully dry — never pour or spread over wet or tacky primer.
Related supplies
FAQ
Do I always need to prime before pouring a self-leveler?
On absorbent concrete, yes — nearly every self-leveling underlayment manufacturer requires a compatible primer first so the leveler doesn’t dry too fast at the surface and lose its bond. Skipping the primer is one of the most common causes of a self-leveler failing to bond.
How much Ardex P 51 Primer (1 gal) do I need?
Use the calculator on this page — enter your square footage and we’ll size the exact quantity, based on 1 gal covering about 400 sq ft.
Not sure which product you need?
Use our supplies calculator to get a full kit recommendation for your floor type and subfloor, or ask us directly.