Flame retardants composed of solid particles generally have an adverse effect on the physical and aesthetic properties of polymers. Even melt belndable Flame Retradants and liquids can have a negative effect on properties and hence it is important to not only screen for FR effeciency but also measure all the physical properties of the host resin and compare it with the base properties. The importance of choosing the whole flame retardant system, FR package, antioxidants, stabilizers etc and their affect on flame retardancy, aesthetics, properties and polymer processing is extremely important.