Indeed, the acidic cleaner is a DryTreat Stain Proof product, previously Eff-Erayza. It targets deposits such as efflorescence, limescale and grout haze on surfaces that are not sensitive to acid.

• Efflorescence removal from stone, tile and masonry
• Limescale and grout haze on non-acid-sensitive surfaces
• Mineral deposit removal ahead of resealing

Available in 1qt/946ml.