Ardex P 4 Multipurpose Primer
A rapid-drying bond and moisture primer for subfloors before adhesive or leveller. Works under vinyl, laminate and engineered hardwood installs. Available in 1 gal and premixed 3.5 gal.
Free pickup in Markham (ready next business day) · GTA delivery $140
Specs
| Category | Adhesives & Primers |
| Size options | 1 gal · 3.5 gal |
| Unit sold | 1 gal (1 gal) |
| Availability | Ready for Markham pickup next business day |
| Coverage | ~300 sq ft per gal |
| Floor types | Vinyl Flooring, Laminate Flooring, Engineered Hardwood |
| UPC | 709850008012 |
| Code | ARP4-04 |
How to use Ardex P 4 Multipurpose Primer
- 1Make sure the subfloor — concrete, plywood, or gypsum — is clean, dry and free of dust, paint, sealers, or old adhesive residue.
- 2Ardex P 4 is a multipurpose primer, so check the bag/pail of the leveler or adhesive you’re about to use for the mix ratio and coverage rate it recommends with this primer — every downstream product’s instructions take priority here.
- 3Roll or brush the primer on in a thin, even coat — don’t puddle it.
- 4Let it dry fully (it turns from milky to clear) before you pour a leveler or spread an adhesive over it.
- 5Priming first is what lets your self-leveling underlayment or adhesive bond evenly instead of soaking unevenly into a porous slab.
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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 4 Multipurpose 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 300 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.