First, identify what is already on the floor
Concrete paint, a two-part epoxy, a clear sealer and a densifier can look similar after years of tire traffic. Tell the estimator what you know about the previous work and show where it has failed. Photograph tire-path peeling, glossy patches, dark oil areas and any white powder at the surface. The plan for a well-bonded coating may differ from the plan for a weak one.
| What you see | Question for the estimator |
|---|---|
| Paint lifting at tires or edges | How will the failing layer be removed and the remaining bond checked? |
| Water beads on bare-looking concrete | Is a sealer or treatment present, and how will it be prepared? |
| Dark oil stain that returns after cleaning | How deep is the contamination and what cleanup or repair is needed? |
| Both coating and exposed concrete | How will the prep create a consistent surface across the whole floor? |
Old paint: the new layer inherits the old layer's weakness
The Rust-Oleum EpoxyShield instructions tell users to remove loose paint and test remaining adhesion. Their tape test is a product-specific screening procedure, not a guarantee that another manufacturer's coating will bond. For a professional system, ask whether the old finish will be removed by grinding or retained only after compatibility and bond checks.
Paint removal can expose cracks, spalls or previously hidden oil spots. That is why a quote based only on square footage often misses the expensive part of a recoating job: restoring a clean, sound substrate.
Sealer: a floor can be too closed for a coating
Water beading on concrete is a clue that a sealer may be present. The same manufacturer instructions warn that their coating may not adhere properly to sealed concrete. A water-drop test alone cannot identify the treatment or prove the floor is ready. Ask how the contractor will verify and prepare the surface for the product they propose.
Oil: cleaning is part of the bond, not cosmetic work
Oil and grease in the concrete can prevent adhesion even when the floor looks less stained after a quick wash. Sherwin-Williams' surface-preparation guide calls for removing oils, grease and other contaminants before resin flooring. It also notes that success depends on how far the contamination penetrated. If a dark patch returns after cleaning, show it to the installer rather than hiding it beneath a sample board.
Ask whether degreasing, mechanical removal, localized repair or a different system is needed. These are site decisions. No article can decide from a photograph how deep the oil has traveled into a particular slab.
What a useful recoating quote says
- Which existing layers are present and which will be removed.
- How oil and grease will be cleaned, and how the surface will be checked afterward.
- Which cracks, pits and spalls are being repaired.
- How the prepared concrete will meet the coating manufacturer's profile and moisture requirements.
- What is excluded if deeper contamination or unsound concrete appears during preparation.
If you are comparing estimates in Lebanon or Beech Grove, use those five lines to compare scopes before comparing prices. A lower bid may simply leave the old coating in place.
Technical references: Rust-Oleum product instructions; Sherwin-Williams surface-preparation guide. These sources explain principles; the installed product's instructions control the final preparation plan.
Want a plan for your actual slab?
Bring photos and any concrete or old-coating details to an on-site estimate. We can review the surface before specifying a finish.
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