2026-09-14 Operators of coastal and heavy-industry transmission corridors are quietly compressing their RTV silicone anti-pollution flashover coating re-application cycles from the historical 8–10 years to 4–6 years. This article, written from today's market-watch signals, explains which field measurements justify the shorter interval, what acceptance evidence you should require from a coating contractor before handover, and how to renegotiate framework agreements so that the new cadence is funded rather than fought. The practical takeaway: if your substation sits within 10 km of a salt-water coastline, a cement plant, or a petrochemical complex, plan to budget for re-application on a five-year cycle starting in 2026.