What Makes a Paint Warranty Real

The Number on the Quote Is the Easy Part

“Ten-year warranty” is the easiest thing to write on a corporate painting quote and the hardest thing to actually back. The number costs nothing to print, and on its own it protects no one. So the useful question for any facilities or procurement team is not whether a contractor offers a decade warranty — most will — but whether the warranty is real: backed by evidence, traceable to the work, and enforceable when something fails in year three. This article is about how to tell the difference before you sign.

The first thing to be clear about is what the warranty is. A decade paint warranty is a commercial guarantee — a contractual promise from the contractor, backed where applicable by the coating manufacturer’s system warranty. It is not an industry standard or a published code. The international standards involved (ISO 12944, ISO 2808, ISO 8501, ASTM D3359) are how the work is verified; the ten years itself is cover the issuer stands behind. A real warranty is one where that cover is written against the verification, not floated above it.

The Four Tests of a Real Warranty

Does it name the system?

A real warranty names the coating system it covers — substrate, primer, intermediate, finish, chosen for the exposure. A warranty that just says “ten years” without naming what is guaranteed has guaranteed nothing specific. Where exposed steel is involved, the system should be specified to ISO 12944 corrosion classes against the real exposure.

Was the substrate verified?

Most early failures come from the substrate, not the paint. A real warranty rests on a substrate assessed and prepared to a recorded grade — prep defined to ISO 8501, adhesion to difficult substrates verified to ASTM D3359. Ask whether prep was graded and recorded, or just done.

Was the thickness measured?

A coating only delivers its rated life at its specified dry film thickness. A real warranty rests on DFT measured to ISO 2808 across the warranted areas as the work proceeds. If nobody measured the film build, the warranty is backed by optimism.

Is there a dossier?

This is the decisive test. A real warranty comes with a dossier — stage QC sign-offs, prep grades, DFT readings, batch records — where every claim on the certificate matches a record taken during the work. A certificate with no dossier is a marketing line; a certificate with one is an obligation you can enforce.

What to Require at Handover

To hold a warranty you can actually use, require the dossier at handover, not just the certificate: the approved decade-warranty system spec, prep records, verified DFT readings, batch records, stage QC sign-offs, and the certificate referenced to all of it. The specification the warranty is written against should already require these — which is why the warranty starts at the spec, not at completion.

Real Cover, Not a Printed Number

The difference between a real warranty and a printed number is a dossier. Anyone can offer ten years; only a contractor who verified the work and kept the records can stand behind them. Require the evidence, and the warranty becomes worth holding. To commission a corporate finish with a warranty backed by its dossier in Accra, Tema, Kumasi, or Takoradi, contact the Corporate Painters project office on +233 23 063 0016.