2hrs.
Description
Versatile phosphoric acid for treating surface rust and removing scale and efflorescence from concrete, tiles, and metals prior to coating. Favoured for its controlled reactivity compared to stronger mineral acids when used correctly. Dilute as required, apply uniformly, and rinse thoroughly. Avoid acid‑sensitive stones and always perform a test patch. Use appropriate PPE and ensure ventilation. Store upright away from incompatible materials. Supports dependable surface preparation and maintenance tasks on site or in the workshop.
