• Consists of two layers.
  • Outside layer shrinks. Inside layer of adhesive melts.
  • The adhesive seals the connection completely, making it strong and perfectly waterproof.
  • Excellent corrosion, U.V., water, chemical and acid resistance.
  • Can be applied directly to copper.
  • Durable.
  • Thermoflux moulds to any shape.
  • Fast, simple and safe to use.
  • Flame retardant and permanently flexible.
  • Easy to apply.


Thermoflux is a flexible, heat shrinkable dual wall tubing with an integrally bonded meltable adhesive inner lining, designed to provide permanent moisture proof encapsulation to a wide variety of substrates and uses. Thermoflux has a unique inner wall which melts when heated and is forced into the crevices and interstices by the shrinking of the outer wall. When cooled the entire mass becomes a flexible, tough homogeneous covering with a controlled wall thickness. Thermoflux is manufactured from radiation cross-linked polyolefins. Thermoflux shrinks to 1/3 of its supplied diameter and thus only a few sizes (8) are required to cover a full range of irregular shapes in a wide variety of applications.

Why use Thermoflux?

  • insulation and protection of wires and components
  • wire terminal protection
  • reinforcement of wire splits
  • prevention of electrolytic corrosion
  • insulation and protection of automotive electrical parts
  • protection of coaxial cable connectors
  • synthetic, fuel and hydraulic oil resistant applications
  • can be used on all electrical applications (cables – cables splycing – connections), to insulate, to protect and to seal. Can be used in contact with chemicals. Is not resistant to earth alcalines. Protects metal tubing against corrosion and wear.

Technical Description

  • Temperature resistence: -55 + 150°C.
  • Shrink temperature: 125°C.
  • Shrink ratio: 3/1.
  • Tensile strenght ISO 37: 11.5 MPa.
  • Ultimate elongation ISO 37: 490%.
  • Flexibility: flexible.
  • Dielectric strength I EC 243: 30 MV/m (VDE 0303 Pt2).
  • Electrical resistance: 1013Ohm.
  • Flame retardancy ASTM D 876, ASTM D 2671: Inner wall: no. Outer wall: yes, retardant.
  • Fluid resistence ISO 1817 and ISO 37 Immersion 24h at 23°C: hydraulic fluid: excellent; aviation fuel F 40: good; lubricating oil 0-149: good; Diesel fuel F-54: good.