On commercial tonnage, the coating's paperwork can matter as much as its chemistry: surveyors ask for it, flag states require it, and a missing certificate can hold a vessel as effectively as a failed inspection. The stack is smaller than it looks; three layers cover most questions.
IMO PSPC for ballast tanks
The Performance Standard for Protective Coatings applies to seawater ballast tanks on ships built since its entry into force, mandating approved epoxy systems, surface preparation standards, film thickness regimes and inspection records compiled into a Coating Technical File that stays with the vessel. Repairs and maintenance in ballast tanks are expected to follow the same logic, which shapes product choice at every docking.
Classification society type approvals
Class societies type approve coatings for specific duties, ballast tanks, cargo holds, decks, and surveyors expect to see approved products in those services on classed vessels. Checking the certificate against the actual class society and the actual service, a ballast approval is not a cargo tank approval, is the buyer's two minute diligence that prevents expensive surprises at survey.
The AFS declaration layer
Antifouling compliance runs through the IMO AFS Convention framework covered in our regulations article: the IAFS certificate for larger tonnage, supplier declarations of compliance beneath it. Current documented stock from reputable suppliers carries this automatically; aged or informal stock is where the risk hides.
What to ask for with the quote
Type approval certificates for the intended service, product data sheets matching the certificate revision, and batch documentation at delivery. Suppliers serving commercial marine work produce these without friction, and MENA Industrial Supplies includes them as standard on marine range quotations from Dubai.