Hercules® Pro Dope® 15420 Thread Sealant, 0.5 pt Screw Cap Can with Brush, Gray

HEPROOZ8 MFG #: 15420
  • Base Type: Oil
  • Bonds To: Aluminum, Black Iron, Brass, Copper, Galvanized Steel, Glass, Monel, Stainless Steel
  • Composition: Calcium Carbonate, Petroleum Based Lubricating Oil, Kaolin, Menhaden Oil
  • Container Size: 0.5 pt
  • Container Type: Screw Cap Can with Brush
  • Country of Origin: US
  • Flash Point: >212 deg F
  • Manufacturer Name: Oatey
  • Odor/Scent: Fish Oil
  • Viscosity Rating: 30000 cPs
  • VOC Content: 11 g/L
A versatile thread sealant for use on black iron, galvanized steel, copper, brass and aluminum pipe and fittings. Can be used on lines carrying natural gas, air, steam, hydronic heating, ammonia, brine, diluted acids and sprinkler systems. Pro Dope® will not drip, is lead free, non-toxic and wont spill. It is non-separating and provides a tight, positive, leak free seal. Pro Dope® prevents rust and inhibits corrosion by forming a protective coating on threads. It is non-hardening and joints can be disassembled without damage to pipe fittings or threads. Pro Dope® is easily applied with a natural bristle brush in temperatures as low as -15 deg F and performs over a temperature range of 0 to 350 deg F. Pressure rated to 250 psi for liquids and 200 psi for air/steam. Pro Dope® is a grey colored thread sealant which contains no lead.
  • Features and More


  • An oil based thread sealant designed for use with metal threaded pipe
  • Suitable for use in temperatures ranging from 0 to 350 deg F
  • Prevents rust and corrosion
  • Withstands air and steam pressure upto 200 psi
  • Do not use for LP gas lines or on plastic pipe
  • Wipes clean from hands
  • Will not leak or drip out of the container
  • Resists hardening and cracking
  • Oil-based thread sealant with a uniform, smooth consistency for easy application
  • https://youtu.be/vjx9oxKBvhw


  • For water
  • natural gas
  • air
  • steam
  • ammonia
  • brine
  • diluted acids and alkalis and metal threaded pipe


  • CE Certified
  • FBC System Compatible
  • Military Specification TTS-1732/MIL-A-12352A
  • NSF/ANSI 61 for Potable Water
  • PROP65: Cancer - www.P65Warnings.ca.gov