www.phcppros.com/articles/19492-oatey-hercules-sludgehammer-universal-corrosion-inhibitor

Oatey Hercules Sludgehammer Universal Corrosion Inhibitor
May 15, 2024
Hercules Sludgehammer Universal Corrosion Inhibitor protects against corrosion and lime-scale build-up while helping maintain heating system efficiency. It is suitable for all metals, including aluminum, cast iron and stainless steel.
Oatey