Overview

The Dulux Avista Exposed Aggregate Concrete Sealer is a solvent-based clear coating purpose-made for exposed aggregate concrete. It is formulated for the mix of smooth stone and porous cement matrix that makes exposed aggregate difficult for a general-purpose sealer, and it brings out the natural colour of the stones with a semi-gloss wet-look finish.

Because it is designed for this specific surface, it absorbs evenly across both the stones and the matrix, avoiding the patchy finish that a general sealer can leave on exposed aggregate. It protects driveways, paths, patios and pool surrounds from staining and weathering.

Key Features

• Purpose-designed for exposed aggregate surfaces
• Semi-gloss wet-look finish that enhances stone colour
• Very good UV resistance against Australian sun
• Good chemical resistance to chlorine, salt and alkali cleaners
• Applies to new and older exposed aggregate
• Solvent-based for penetration and film hardness

Specifications

• Pack size: 20L
• Finish: semi-gloss wet look
• Coverage: approximately 3 to 5 m2 per litre per coat
• Recoat: 3 hours; rain resistance 2 hours; foot traffic 24 hours; vehicle traffic 5 days
• Application temperature: follow the product data sheet
• Service life: typically 2 to 4 years before a maintenance coat

Applications

• Exposed aggregate driveways
• Exposed aggregate paths and garden edges
• Patios and alfresco areas
• Pool surrounds with exposed aggregate

What You Need to Complete the Job

Make sure the exposed aggregate is clean, dry and fully cured, then apply two thin coats with a solvent-resistant sleeve. For sloped driveways and pool surrounds, add the Slip Res Additive Crushed Glass to the final coat. If the aggregate is newly exposed, it was likely revealed with the Exposed Aggregate Surface Retarder. Sealers sit in the Concrete Sealers range.

Frequently Asked Questions

Why do I need a sealer specifically for exposed aggregate?

Exposed aggregate has a unique profile: smooth, non-porous stones set in a more porous cement matrix. A general-purpose sealer can absorb unevenly, soaking into the matrix but sitting on the stones, which gives a patchy finish. This sealer is formulated to cover both materials evenly.

Will it make the aggregate look glossy and artificial?

The finish is a semi-gloss wet look that deepens and enriches the stone colours without an unnatural, high-gloss plastic appearance. The stones look vibrant, like when they are wet, but the texture stays visible. For a completely natural finish, use the Dulux Avista Water Based Penetrating Sealer instead.

How soon after laying exposed aggregate can I seal it?

Wait until the concrete is fully cured, a minimum of 28 days from the pour. Sealing too early traps curing moisture, which can cause whitening, blistering and adhesion failure. If a surface retarder was used to expose the aggregate, the wash-off must be complete and the surface dry before sealing.

Will my driveway become slippery after sealing?

It can, especially on a slope. All film-forming sealers reduce the natural micro-texture of concrete to some degree. For sloped driveways, pool surrounds and high-traffic pedestrian areas, add the Slip Res Additive to the final coat. This keeps grip without affecting the clarity of the finish.