For use with porcelain, ceramic, natural stone, glass and mosaic tiles For grout joint widths from 1/16-in to 1/8-in Mix with MAPEI Grout Maximizer instead of water for increased stain resistance and flexibility For application in submerged conditions (swimming pools, spas, water features and fountains) once fully cured (after 21 days) Contains BioBlock technology for mold and mildew resistance Don't forget your color matched MAPEI caulk Using this MAPEI product may help contribute to LEED certification of projects CA Residents: Prop 65 Warning(s)