What Is Etch Primer? How It Works, When to Use It, and What to Apply Over It

Etch primer is a single- or two-component primer that uses a dilute acid — typically phosphoric acid — combined with a film-forming resin to simultaneously clean, lightly corrode, and coat a metal surface in one application, creating a chemically bonded foundation for subsequent coating layers. This guide is for engineers and coating specifiers working with […]