Customers often ask how many coats of sealer a project needs. The most accurate answer is that the coat schedule must match the pavers, the product and the desired finish.
Begin with the flood coat
The flood coat is intended to penetrate and support joint stabilization while establishing the first layer of the system. For Seal ’n Lock 1K sealers, the flood coat is typically diluted 1:1 with water. For Seal ’n Lock 2K systems, fully mix Part A and Part B before applying the typical 3:1 water dilution.
Add finish coats with control
Finish coats are typically diluted 1:1 across Seal ’n Lock systems. Apply a finish coat after the preceding coat is dry to the touch and visibly dry. Additional finish coats may add barrier protection and influence gloss, but each coat must remain uniform and compatible with the film already present.
Porosity changes material demand
Porous concrete pavers may absorb more of the flood coat than dense or previously sealed surfaces. A dense surface may build film quickly. Applying the same volume to both can produce very different results.
Signs that too much material is being applied
- Persistent puddling or slow, uneven drying.
- Milky or cloudy areas.
- Roller, spray or overlap marks that do not level.
- Excessive film buildup at low points or edges.
- A finish that becomes inconsistent rather than more uniform.
Use a test area to establish the coat schedule
A representative test section should use the planned preparation, dilution and equipment. Evaluate absorption after the flood coat and appearance after each finish coat. Stop when the target finish and uniformity have been achieved within current product guidance.
Place slip resistance in the final coat
When PRO-Traction is specified, add or distribute it with the final coat so the slip-resistant material is positioned at the finished surface.
The objective is controlled film development—not a predetermined number applied regardless of conditions. Follow the current label and technical data sheet for the selected product.
Next step: Use a representative test area and consult Seal ’n Lock when planning a coat schedule for an unfamiliar surface.
