The White Stain on Your EPDM Rubber Surface :Is that Fading Or Dirty?
They’re likely not dirt or fading—but cement efflorescence caused by moisture drawing salts from the concrete base. These powdery white patches often reappear after cleaning if the underlying issue isn’t addressed. Avoid harsh chemicals or high-pressure cleaning. Instead, use a specialized EPDM-safe efflorescence remover. Prevention starts with proper base curing, moisture barriers, and drainage planning.
Aug 8,2025