Bonsal American presents Bonsal B-6000, an advanced polymer-based product that offers both waterproofing and crack isolation properties. B-6000 dries quickly in four hours and can be applied over practically any substance, according to the company. When applied directly beneath tile, the product also inhibits the growth of mold and mildew, Bonsal notes. Circle 346 on the Reader Inquiry Card.www.bonsal.com