Identifying Loose, Crumbling, or Contaminated Areas Before Resining Concrete

What to Look For on Concrete Surfaces

Start by inspecting your concrete for visible cracks, flaking patches, or sections that sound hollow when tapped with a hammer handle. Areas with powdery dust, persistent damp patches, old coatings, or oily stains are also signs of contamination or instability. These spots risk undermining resin adherence, causing bubbling or peeling over time.

How to Address Loose or Contaminated Patches

• Remove unstable material: Scrape, wire-brush, or grind away any loose, flaky, or weak concrete until only solid substrate remains.
• Clean the surface: Use a broom and vacuum to eliminate dust, then wash thoroughly to remove grease, oils, and any residues. Allow the surface to dry fully before proceeding.
• Treat stubborn contaminants: Apply a degreaser or mild acid etch if the surface is particularly soiled. Rinse well and neutralise if necessary.

For highly porous or repaired areas, using a suitable primer like Epoxyprimer helps promote strong and uniform resin bonding.

When This Matters

Thorough surface checking and preparation are essential when longevity matters, such as with driveways, garages, and outdoor paths. Skipping this critical step can result in premature wear or costly repairs later.