b'STONE STONE Therefore,thesestonesshould is sponsored by ONLYbecleanedwithaneutral cleaner! Before applying any prod-uct, always test it on a section of stonenotbeingused,oranarea that will not be in plain sight.Non-calcareous (siliceous) stone UltracolorPlusFAwithiscomposedmainlyofsilicaor DropEffecttechnologyisafast- quartz-like particles. Types of non-setting, non-shrinking grout withcalcareous stones include granite,ne aggregate for grouting tile and stoneslate, sandstone and quartzite. For jointwidthsfrom1/16to3/4the most part, these stones tend to (1,5 to 19 mm). Thene aggregatebe very durable and most are acid-formulationmakesUltracolorPlusresistant. Be advised, some of the FAanall-in-onegroutreplacementmoreexoticstoneshaveveinsof forsandedandunsandedgrouts.calciumcalcite,whichcanmake DropEffecttechnologyreducessur- them acid-sensitive. Whereas acid-face absorption to help repel water, dirt and grime from penetrating groutresistantstonescangenerallybe joints.UltracolorPlusFAisformu- cleaned like porcelain tiles, I rec-lated with 10% recycled content andommend to always test fi rst via the meetstheANSIA138.1speci ca- small aforementioned exercise.tion for Green Squared certi cation.Now that you know your stone, mapei.com letsdiscussthesurfacefi of Features and Bene ts:nishEasy to install and stain-resistant acid-sensitive stones. Color-consistentHoned fi nishes on acid-sensitiveNo ef orescence stonescanwithstandalkalineNo sealer requiredcleaners.10%recycledcontentTCNA Polishedacid-sensitivefin-Green Squared Certi edishescanbedulledbystrong alkalines; again neutral cleaners Etching on marble counter.86 TileLetter | November 2019'