Paint defect diagnosis wizard Construction tools
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Before you rely on the result

  • Treat the ranking as a triage aid. Confirm the product data sheet, local standards, and supervisor instructions before recoating.
  • High temperature, high humidity, a small dew-point spread, and a wet substrate can contribute to several defects at once.
  • A low-confidence result usually means the wizard needs more environmental or process clues—not that the coating is sound.

How to use the wizard

  1. Select the defect or defects visible on the film.
  2. Add the stage, pattern, substrate, coating system, method, and environmental conditions.
  3. Fill in surface condition and process details such as substrate moisture, film thickness, mix ratio, and pot life.
  4. Run the diagnosis, then review the leading cause, matched clues, checks, and corrective actions.
  5. Use Share to copy a URL that restores the current state in another browser.

Sample cases

Blistering after drying

Input

Blistering, during drying, concrete substrate, 28°C air, 38°C substrate, 88% RH, damp surface, porous undercoat, thick wet film.

Expected result

Trapped moisture should rank near the top. Check dew-point spread, substrate moisture, and ventilation first.

Cratering from contamination

Input

Cratering, localized pattern, oil/silicone contamination, spray application, high sun load.

Expected result

Oil or silicone contamination should lead the ranking. Clean the surface and verify spray-air quality before recoating.

Blushing in humid weather

Input

Blushing, solventborne coating, low temperature, high humidity, poor ventilation.

Expected result

High-humidity blushing should rank first. Increase the dew-point gap and wait for better conditions.

FAQ

Can I select more than one defect?

Yes. The wizard ranks causes using all selected symptoms together, which helps when one job shows several defects.

Why does temperature matter so much?

Temperature affects flash-off, cure speed, condensation risk, and solvent release. These effects can trigger blistering, pinholing, cratering, and blushing.

What is the bilingual alias for?

It shows the alternate-language name beside the local label, so cross-border teams can discuss the same defect or cause without guesswork.

Why does a share URL include the full state?

It lets another person restore the same diagnosis state without re-entering all field notes.

What should I do when confidence is low?

Add more clues—environment, substrate moisture, contamination, film thickness, mix ratio, pot life, and recoat timing usually improve the ranking.

Glossary

Dew-point spread

The gap between substrate temperature and dew point. A small gap increases condensation and blushing risk.

Flash-off

The early evaporation stage after application. If it is too fast, pinholing and cratering are more likely.

Pot life

The usable time after mixing a two-component product. Once it expires, cure and flow become unreliable.

Recoat window

The time window in which the next coat can bond correctly to the previous coat.

Outgassing

Gas or moisture escaping from the substrate and pushing through the coating film.

Blushing

A hazy or whitish appearance caused by moisture, solvent balance, or cure problems.

Scoring rules

  • Dew-point spread = substrate temperature − dew point
  • Dew point is estimated from air temperature and relative humidity
  • Each selected defect adds weight to causes that commonly produce that symptom
  • The highest score becomes the lead diagnosis; matched clues explain why

Notes

  • This wizard is a field-triage aid, not a substitute for specification review or product testing.
  • If the result looks wrong, confirm the actual defect pattern first. Similar symptoms can have different causes.
  • Weather, sunlight, and substrate temperature can change quickly. Recheck conditions right before application.
  • All inputs stay in the browser; nothing is sent to the server.

Related tools

Dew point checker

Drying and recoat timing planner

WFT/DFT Coating Coverage Calculator