Hercules® Sludgehammer™ Universal Corrosion Inhibitor protects against corrosion and lime-scale build-up while helping maintain heating system efficiency. Behold the power of Hercules®, products built to last and trusted by plumbers to withstand even the toughest conditions.

• Suitable for all metals, including aluminum, cast iron and stainless steel
• Meets ASTM D 4340 - Corrosion Test for cast aluminum alloys in engine coolants
• Replaces Cryo-tek Inhibitor (35276 & 35278) and Cryo-Tek AL Inhibitor (35277 & 35274) in the United States
• Replaces Cryo-tek Inhibitor (352769) in Canada