Hercules® 1 qt. Boiler Liquid

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Hercules® Boiler Liquidseals and repairs cracks and leaks in steam or hot water hot water heating boilers. The long lasting seal expands and contracts with heat, resists pressure, and is not affected by boiler cleaners.

Click a file below to view/download

  • pdfSeasonal Boiler Maintenance Tips https://www.oatey.com//ASSETS/DOCUMENTS/ITEMS/EN/Oatey_BoilerMaintenance20170912_R1.pdf
  • pdfSDS https://www.oatey.com//ASSETS/DOCUMENTS/ITEMS/EN/SDS US - Hercules Boiler Liquid.pdf
  • pdfSubmittal https://www.oatey.com//ASSETS/DOCUMENTS/ITEMS/EN/BoilerLiquid.pdf
  • Part Number: 30115
  • Min. Order QTY: 12
  • UPC: 032628301153
  • Case QTY: 12


  • Prevents steam boiler surging
  • Will not clog or coat submerged hot water heating coils, controls, vents or valves
  • Resists high pressure and is not affected by boiler cleaners
  • Will not cause priming or foaming


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