SUREBOND-488 Efflorescence & Rust Remover is a safe, acid based cleaner formulated specifically for use on pavers, concrete and retaining walls. The product quickly, safely and easily removes mineral deposits like efflorescence that form naturally within building materials and from external sources like rust and hard water. SB-488 Efflorescence & Rust Remover’s unique Clean Rinse Technology lifting power allows deposits and residue to be quickly and easily rinsed away with a high or low pressure water sprayer. The product is suitable for both horizontal and vertical surfaces and is biodegradable and phosphate free. It does not contain muriatic, nitric or hydrochloric acid.