GHOSTSHIELD HYDRO-ETCH 1000: A powerful, acid-based concrete cleaner, etcher and efflorescence remover. Available in an industry leading, concentrated formula. A SAFER ACID ETCH: Less caustic than traditional muriatic acid, but just as powerful, the 1000 cleans and creates an effective surface profile by opening the substrates pores. Specially formulated to clean, brighten and etch concrete while removing efflorescence, dirt, algae and scum. CREATES SURFACE PROFILE: Easily applied with a sprayer, the 1000 can be used indoors and outdoors on new and old concrete, brick and masonry. CLEANS & BRIGHTENS: This solution leaves concrete cleaner, lighter and brighter than the day it was poured. Shipped concentrated, this product is diluted with 3 parts water for a lighter etch or diluted with 1 part water for a heavier etch. Ammonia or baking soda are used after etching to neutralize the substrate.