Textured Coating Formulation Textured coatings utilizing the unique properties of perlite may be formulated for spray application and roller application. On a volume basis, significant quantities of perlite may be used to produce distinctive textures. In addition to lowering the cost of coatings, a reduction in weight also can be attained because of the low density of perlite. Trials should be conducted to determine the optimum amount of perlite necessary to achieve the desired texture. Aggregate Blending Expanded perlite is a mineral aggregate and the coarser particle sizes will not permit high shear rates during mixing.
Slow speed mixing with broad paddles is recommended.
Formulations requiring a high level of shear should be mixed with high-speed equipment prior to the addition of perlite. For bold textures, a deeply patterned roller is recommended for best results.