BASF MasterProtect P 110, formally called Thoro Bond, is a water-based polyvinyl acetate bonding agent. P 110 improves adhesion of plaster or concrete mortar to various types of substrates. This product is alkali resistant which will stand up to chemical invasion from cement-based and masonry materials. BASF P 110 will appear slighly tinted for easy visual detection of coverage. BASF MasterProtect P 110 can be applied by brush, roller or spray to masonry, gypsum plaster, gypsum board (drywall), portland cement plaster, concrete and stucco under various jobsite conditions before topping with plaster or concrete mortar. Applications include interior and exterior, vertical and overhead, horizontal (interior only) and above grade. Most importantly, MasterProtect is VOC compliant for EPA and most regional jurisdictions. Note that MasterProtect 110 should never be used under constant exposure to wet conditions, such as swimming pools, decks, retaining walls, sidewalks, parking ramps, or below-grade areas.