Do SEAL-ONCE products prevent efflorescence?

Yes, SEAL-ONCE® NANO GUARDTM, NANO GUARD PLUS POLY and ACRYLIC POLY all prevent efflorescence, which occurs when water penetrates the concrete and leaches out naturally-occurring salts, creating undesirable white stains on the concrete. Efflorescence must be removed prior to applying SEAL-ONCE products. We recommend using our Re-New Concrete cleaner.