Discover our high-performing, easy-to-apply grout sealant solutions Whether you’re sealing your newly applied tiles or require a grout sealant for restorative purposes, professionals and DIYers worldwide are always curious to know where they can find the best grout sealer. Smart benefits Sealing grout is an essential component of nearly all tile installations. So we start by making sure our grouts do the basics well. Bostik grout sealers prevent stains, protect your tiles from moisture and chemical damage and keep mold and mildew at bay. We also offer high-performing grouts for challenging environments. If you’re applying tiles in spaces such as kitchens or bathrooms, our sealant is perfect for use with ceramic, natural stone and a whole host of synthetic materials.