Stainless steel cleanroom panels are moving from premium-spec exception to default spec in aseptic pharma, VHP suites, seafood and meat washdown halls, BSL labs and coastal electronics lines, while color steel cleanroom panels keep the dry ISO 7–8 and Grade C/D buffer market. The buying decision is no longer a sticker-price argument. It is a total-cost-of-ownership call built on initial USD/m², coating degradation under VHP/chlorine, recoat and revalidation labor, unscheduled shutdown, replacement cycles and audit risk. This module gives procurement engineers, cleanroom GCs and pharma/food project leads the 2026 cost bands, 10-year TCO tables, disinfection-duty breakpoints and a vendor checklist anchored to SAMZOON's Foshan source line — free samples, custom cores, expedited reschedule and on-site node review for South China purification works.