Calcium, Lime and Rust Remover, Surfaces for Use On Brass, Chrome, Copper, Fiberglass, Glass, Porcelain, Plastic, Stainless Steel, Vinyl, Trigger Spray Bottle, 32 oz, Fragrance Unscented, Concentrated, Recommended Dilution 1:8 (Light Soil); 1:1 (Medium Soil), EPA Safer Choice, Primary Chemical None, Cleaner Form Liquid, Product Series CLR(R) Pro, Application Temperature 40 Degrees F or Above, Features Safe On All Plumbing Including Copper and Plastic/PVC, VOC Content 0 Percent, Biodegradable Yes