Thermoplastic acrylic polymers are used in the decoration and protection of masonry and concrete, for both interior and exterior applications. Due to the highly alkaline nature of most masonry materials, one of the fundamental properties required for high performance long-life coatings on such a substrate is resistance to saponification. Unlike alkyds (polyesters), acrylic polymers have a carbon-carbon backbone which is much less vulnerable to chemical attack. These resins offer very good light-fastness for exterior use and also confer: • Excellent adhesion. • Resistance to mould growth – usually better than water- borne latex systems. • Hydrolytic stability. • Breath-ability – the humidity resident in walls and plasters must be allowed to be released otherwise blistering will result. • Good application properties under adverse conditions such as temperature extremes and damp conditions. In this regard solution acrylic polymers are superior to water based system.