1 Gal. Efflorescence Blocker Mineral and Alkali Sealer and Blocker

Efflorescence Blocker is designed to block and prevent efflorescence and alkali from rising to the surface of a porous substrate. It is ideal for applications where efflorescence is not preventable and is constantly being maintained. It is typically used on floors where waterproofing membranes have failed, were not installed, or other applications where moisture penetration is unavoidable. The finish results in a natural appearance, with some substrates slightly darkening. Please keep in mind, Efflorescence Blocker is a preventative — if the surface already has efflorescence staining it will need to be removed first. Use Rainguard Pro Restore-N-Prep to remove any stains or efflorescence for best results. Ideal for use on waterproof membrane failures, concrete floors, retaining walls, garden stones and pavers, salkways, sound walls, stucco, EIFS, high alkali or mineral substrates, and more!