Is grinding always required?
Most professional systems need mechanical surface prep, but the exact method depends on the slab and product system.
Installation guide
Garage Floor Coating Prep
Concrete preparation is one of the biggest differences between a coating that lasts and a coating that peels.
Prep before product
The coating can only bond as well as the surface allows.
Garage floor coating prep usually includes cleaning, mechanical grinding or profiling, crack repair, dust control, and checking for issues that could affect adhesion. Skipping prep may save money upfront, but it is one of the most common reasons coatings fail.
When comparing quotes, ask providers to explain their prep process in plain language. A good answer should cover how they open the concrete surface, handle edges, repair cracks, remove old coatings, and deal with oil contamination.
- Diamond grinding
- Crack repair
- Oil stain treatment
- Old coating removal
- Moisture checks
- Edge and corner work
Prep questions for your quote
Ask whether acid etching is used or whether the floor is mechanically ground. Ask what happens if the concrete has moisture issues, soft spots, heavy pitting, or a failing old coating. These details affect cost, timeline, and durability.
Can cracks disappear completely?
Cracks can often be filled or reduced visually, but active movement may show again over time.
What if my garage has old paint?
Old paint or weak coatings usually need removal before a new coating system can bond correctly.