| Factor | DIY kit | Professional install |
|---|---|---|
| Surface prep | Acid etch, occasionally rented grinder | Diamond grind to CSP 2-3 |
| Moisture testing | Rarely performed | Standard before quoting |
| Film thickness | 2-6 mils typical | 12-30 mils typical |
| Topcoat | Often none, or non-UV-stable | UV-stable polyaspartic |
| Crack and spall repair | Consumer patch products | Resin mortar, ground flush |
| Time to complete | 2 weekends + 1 week cure | 1 day + 24-48 hours cure |
| Realistic life | 1-5 years | 15-20 years |
| Warranty | Product only, if any | Labor and materials, typically 5-15 years |
| Cost, 500 sq ft | $500 - $1,800 | $3,000 - $5,800 |
The prep gap is the whole story
Professional installs start with a planetary grinder and a HEPA extractor because a mechanical profile is what a coating bonds to. Most kits instruct you to etch with an acid solution, which leaves an uneven surface and residual salts. That single difference explains the majority of the lifespan gap in the table above.
A DIY project that rents a grinder, runs a moisture test, and buys a separate aliphatic topcoat closes most of the quality gap, and most of the cost gap too.
What a professional install buys beyond materials
- A moisture test and the right primer if the slab needs one
- Crack chasing, spall repair, and joint treatment ground flush
- Consistent mil thickness verified during application, not guessed
- Full flake broadcast to refusal, scraped and topcoated properly
- A labor warranty that covers delamination, not just a defective can of resin
Skill, not effort, is the limiting factor
Coatings are unforgiving of timing. Broadcast flake too late and it sits on the surface. Topcoat too early and you trap solvent; too late and you lose the interlayer bond. Mis-measure the ratio and part of the floor stays soft forever. None of these are fixable after the fact: they are grind-and-start-over mistakes.
The verdict
Hire it out when the floor matters long term, the slab is questionable, or you need it back in service quickly. The cost per year is genuinely lower.
DIY when the space is secondary, the slab is dry and sound, and you are willing to rent a grinder and buy a proper topcoat. Skip the acid etch entirely, whichever route you take.