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Problem

What grit for concrete patch before painting?

Concrete patch edges can show through paint if they are rough or raised.

drywall patch paint primer dry sanding
Answer

For concrete patch before painting, level with 80 or 120, then refine with 180 or 220.

Why it happens
Patch material needs leveling and dust removal before primer or paint.
Recommended grit
Use 80 or 120 for leveling, then 180 or 220 for smoother paint prep.
Wet or dry
Dry, with dust control.
Success check
The patch edge is smooth and blends into the surrounding concrete.

What to do

  1. Let the patch cure as directed.
  2. Level rough edges with 80 or 120.
  3. Refine with 180 or 220.
  4. Remove dust before primer or paint.
Avoid: Do not paint over uncured or dusty patch material.

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