G
GazTech
Stone sealers are in two categories,those that coat the stone,and alter its appearance...and those that impregnate the stone,filling in the micropores,rendering it impenetrable to liquids & oils.The former are wax,acrylic or plastic based products,which wear away with traffic or cleaning,they then have to be stripped and re-applied which is time consuming and very costly.The impregnator sealants however,are solvent or water based,will if properly applied,last indefinitely.Impregnators are formulated to keep out contaminents,but allow the stone to breathe...Since impregnator sealants tend to be a bit expensive at the moment,it's tempting to skimp on the application.This renders it useless as liquids would still penetrate and damage the visible surface.Generally sealer should be applied until the stone is visibly saturated,and excess removed prior to pointing or grouting.I read with delight that already,because of such a problem with poorly sealed stone and complaints..that stone suppliers are factory applying impregnator sealants before distribution....dh ceramics will be happy...as it will save lots of site time ........Gaz
Last edited by a moderator: