Answer
For garage floor epoxy prep, clean first, scuff smooth concrete with 60 or 80, then remove all dust.
Why it happens
Concrete needs a clean, open surface profile before epoxy coating.
Recommended grit
Use 60 or 80 for rough mechanical scuffing, then clean thoroughly before coating.
Wet or dry
Dry, with dust control.
Success check
The concrete is clean, dull, and ready for the epoxy system.
What to do
- Clean oil and contaminants first.
- Scuff smooth areas with 60 or 80 grit.
- Remove all dust completely.
- Apply epoxy only to a clean, prepared surface.
Avoid: Do not apply epoxy over dust, oil, or sealed glossy concrete.