Iron OUT, the #1 brand rust stain remover, offers Iron OUT Automatic Toilet Bowl Cleaner which is specifically designed to repel rust and hard water stains with every flush of your toilet. The concentrated, long-lasting formula cleans rust away and repels new stains from forming for up to 45 days per tablet. This powerful yet safe formula will not harm toilets, internal toilet components, plumbing or septic systems. Iron OUT powder or liquid spray may be used first to clean the toilet bowl before inserting a tablet. Simply drop in a tablet and let Iron OUT ATBC do the work for you. A family owned business that started in 1958, Summit Brands offers highly effective, sustainable, and innovative household cleaning products. Summit Brands began with the distribution of multi-purpose rust stain remover, Iron Out, and has since branched out to include a broader line of specialty cleaning products under the OUT, Glisten and Plink brands. As category leaders in many consumer segments, our goal is to provide high-quality cleaning products that fit the needs of the consumer with guaranteed results.