The new zero-VOC formula of Sherwin-Williams Harmony paint uses the same technology found in baking soda to reduce indoor odors, and does not use silica, so it will withstand frequent washings without weakening its ability to reduce ambient odors, according to the company. Harmony's antimicrobial properties also resist mildew. The length of time Harmony reduces odors, however, depends on the concentration and frequency of exposure the odors have to the painted surface. The paint is Greenguard Indoor Air Quality Certified, Greenguard Certified for Children and Schools, and carries the company’s GreenSure designation.; 800-474-3794