b'ASK THE EXPERTSASK THE EXPERTSQUESTIONis sponsored by Ihaveaclientwithpeacock pavers.Theyhadalargemat infrontoftheirdoorwithtwo plantersoneithersideifit. The planters leaked onto the mat and HYDROBANCementitiousWa- drainedofftheporch,butthe terproo ngMembraneisasingle- dye from the mat has left a bad component, polymer-forti ed cement- stainonthepavers. Anyrecom-basedwaterproo ngmaterialbymendations on how to pull those LATICRETEthatrequiresonlywaterstains out?for mixing, resulting in a faster prepa-ration process. Designed to performANSWERunder both negative and positive hy- I would contact a company that drostatic pressure up to two bars (29makes sealers, grouts, and related poundspersquareinch),HYDROproductsandaskthemifthey BANCementitiousWaterproo nghave a product that will work to Membrane is ideal for use in swim- dissolve the minerals that leached mingpools,andaidsinavoidingin from the planters. Some setting costly repairs from failure. This prod- material manufacturers also make uct can also be used to waterproofproductslikethese.Ifyouknow spas, water features, balconies or ter-races over unoccupied space and allwhichcompanymadethegrout commonbuildingsubstratesthatre- and/or thin-set, they would be the quire protection from water exposure.logical choice to ask fi rst.HYDRO BAN Cementitious Water- Do you have a copy of the NTCA proo ng Membrane was formulatedReferenceManual?Intheman-tobeGREENGUARDcerti edandual,there LEED compliant for sustainable build- isasection ing,equippedwithanti-microbialdedicatedto technology.Solvent-freeandnon- processestoammable. www.laticrete.com.remove stains fromtile andstone.A quickbrowse throughthe tableofcon-tents will point you to this section that will provide tips and tricks that may help remove stains like these. Mark Heinlein, NTCA Technical Director28 TileLetter | November 2019'