Non - Setting Jointing Compounds

Hylomar® M (Light, Medium, Heavy)

Universal Jointing Compound

Hylomar M (Light, Medium, Heavy) is a highly engineered, non-setting and non-hardening jointing compound. The compound is resistant to a wide range of fluids including:

  • Industrial fluids
  • Oils
  • Petroleum and synthetic diester lubricating oils
  • Gasoline and kerosene
  • Water/methanol mixture
  • Water/glycol and methanol mixtures
  • Air
  • Turbine and piston engine combustion products


  • Non-hardening and non-setting
  • Resistant to fuels, oils, coolants and gases
  • Specified worldwide by OEM’s
  • Wide operating temperatures (- 50°C to +250°C)
  • Easy to use
  • Unlimited assembly time
  • Easy to disassemble components
  • For use on metal and plastic close fitting components
  • Use as a non-curing thread sealant
  • Resists vibration
  • Easy to apply to vertical and underside joints due to its thixotropic properties
  • Can be used with or without a gasket

Product Sizes

Pack sizes – 40ml tube (blister card), 80ml tube (carton), 200ml aerosol, 200ml Autopress, 250ml brush-top tin, 300ml cartridge and 1 litre tin.

Typical Applications

  • Inlet manifolds
  • Timing case covers
  • Gearboxes and transmission components
  • Thread sealing
  • Flat Machined Surfaces
  • Water and oil pumps
  • Instrument inspection covers
  • Cylinder head gasket
  • Flat rigid sumps
  • Gas turbines
  • Water cooled generators and turbo vacuum systems

Typical Physical Properties

Temperature range -50°C to 250°C (-58°F to 482°F)
Light Grade
Film Thickness 0.015 mm
Typical Surface Finish 2.0 μm
Area covered by 80ml 2.25m²
Product coverage after drying 2mg/cm²
Film Thickness 0.03 mm
Typical Surface Finish 3.0 μm
Area covered by 80ml 1.36m²
Product coverage after drying 4mg/cm²
Film Thickness 0.09 mm
Typical Surface Finish 3.5 μm
Area covered by 80ml 0.67m²
Product coverage after drying 12mg/cm²


Technical & Safety Documents

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