Lime OUT Heavy-Duty Rust, Lime & Calcium Stain Remover, Multi Purpose Cleaner, 24 Ounce. Lime OUT Heavy-Duty Rust, Lime & Calcium Stain Remover easily dissolves the toughest hard water and rust stains. Made by the makers of Iron OUT, heavy-duty rust removal experts, this product is specially formulated to dissolve tough lime, calcium and rust stains, caused by hard water. The thick, fast acting, concentrated formula is great for use on vertical surfaces as it clings longer for maximum cleaning power.Lime OUT is septic safe and also safe for a variety of both indoor and outdoor applications. 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.Lime OUT Heavy-Duty Rust, Lime & Calcium Stain Remover, 24 Ounce.Thick, powerful fast acting rust, lime and calcium stain removerHeavy-duty, concentrated formula quickly dissolves tough hard water and rust stains as it clings to surfaces for maximum cleaning powerGreat for use on tubs, toilet, sinks, showers, faucets, appliances and exterior surfacesSeptic safeMade in the USA