Stops Rust With Every Flush.
This unique formula prevents the formation of rust and hard water build-up in your toilet bowl and reservoir!
RUSTGuard® contains no acids, caustics, chlorine bleach, phosphates or dyes and won't attack plumbing like chlorine bleach cleaners can!
Safe on all plumbing and septic systems.
Won't harm pets.
| Ingredient | Cas # | Function |
| Sodium Dithionite | 7775-14-6 | Reducing Agent |
| Polyethylene Glycol Stearyl Ether | 9005-00-9 | Surfactant |
| Borax Pentahydrate | 1330-43-4 | Cleaning Agent |
| Glyceryl fatty acid ester | Withheld | Emulsifier |
| Polyethoxylated glycol fatty acid ester | Withheld | Surfactant |
| Polymeric pentasaccharide | Withheld | Thickener |
| Sodium Carbonate | 497-19-8 | Cleaning Agent |
| Sodium Metabisulfite | 7681-57-4 | Reducing Agent |
| Sodium Sulfite | 7757-83-7 | Reducing Agent |
