Why Some Exterior Paints Fail in Just 3 Years: A Practical Guide to Classification & Testing Standards
Exterior wall paint may look like “just a layer of coating,” but in real projects, it is often one of the most failure-prone and costly materials to repair . Have you experienced these issues? ✔️ Color fading or chalking shortly after completion ✔️ Blistering, peeling, or water penetration after rain ✔️ Huge price gaps between “similar” exterior paints ✔️ Products passing sales claims but failing inspections 👉 In most cases, the problem lies not in application, but in incorrect selection and misunderstood testing standards . The core mission of exterior wall coatings is simple but demanding: to withstand complex, long-term outdoor environments . 1. Main Classification of Exterior Wall Coatings From an engineering and testing perspective, exterior coatings are commonly classified by binder type and decorative effect . 1️⃣ By Binder System (Durability-Oriented) Acrylic exterior coatings Silicone-acrylic coatings Pure acrylic or fluorocarbon systems fo...