When should I use a latex/polymer modified mortar versus a standard dry set mortar?
Latex/polymer modified mortars are better materials for bonding ceramic tiles and stone in most circumstances. The following are several conditions where latex/polymer modified mortars are required: * Bonding to exterior-grade plywood. * Bonding to tiles which have less than 3% absorption. * Bonding to substrates with little or no porosity. * Exterior applications. * High traffic areas.