Adhesive lined heat shrink tubes with shrink ratio 4:1

type : ТТК (4:1)

  • Designed for sealing, insulation, and corrosion protection of contact connections in power generation and telecommunications
  • Shrink ratio: 4:1
  • Shrink ratio two times more than standard tubes
  • Material: polyolefin, does not support combustion
  • Color: black
  • All inner surfaces of heat shrinkable tubes has a hot-melt adhesive layer, applied by coextrusion
  • Resistant to UV rays and weather conditions
  • While shrinkage, adhesive layer melts, and fills all the irregularities and provides full leak proofness of complex products with large variations in levels
  • A wide range of shrinkage guarantees good insulation and leak proofness of complex products with large difference levels
  • Packing: cutting by 1-meter length


Elongation at breakpoint

not less than 350%

Shrinking temperature

115-140 °С

Operating temperature

-55 °C to +125 °C

Tensile strength

not less than 10 MPa

Electric durability

at least 20 kV/mm

Operating voltage

Up to 1000 V

Specific volume of electrical resistance

1014 Ом/cm

  • Key parameters
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Name Nominal diameter before shrinkage 
D (mm)

Nominal diameter after shrinkage

d (mm)

Wall thickness after shrinkage (mm)

The optimal range of shrinkage (mm) Packing - cutting (m)
ТТК (4:1)-4/1  4.0 1.0 1.0 3.6 - 1.2 1.00
ТТК (4:1)-6/1.5   6.0 1.5 1.0 5.4 - 1.8 1.00
ТТК (4:1)-8/2   8.0 2.0 1.0 7.2 - 2.4 1.00
ТТК (4:1)-12/3   12.0 3.0 1.4 10.8 -3.6 1.00
ТТК (4:1)-16/4   16.0 4.0 1.6 14.4 - 4.8 1.00
ТТК (4:1)-24/6   24.0 6.0 2.1 21.6 - 7.2 1.00
ТТК (4:1)-32/8   32.0 8.0 2.4 28.8 - 9.6 1.00
ТТК (4:1)-52/13   52.0 13.0 2.4 46.8 - 15.6 1.00

 Adhesive lined heat shrink tubes ТТК 4:1 - a new generation of heat shrinkage of the XXI century rightfully occupies its niche among the adhesive heat shrink tubes, with a shrink ratio- 4:1, for insulation, corrosion protection and sealing of electrical connections.

Tubes ТТК are made from a special composition of polyolefins with the addition of non-toxic flame retardant, harmless to human.

Typical and distinctive feature of this type of tubes- is hot melt adhesive layer, uniformly applied on the entire inner surface of the tube by coextrusion.

The presence of the adhesive layer ensures reliable sealing of any contact joints and gives them additional mechanical strength after shrinkage. Melting and filling all the irregularities of the microrelief by hot-melt glue makes the cable assembly as monolithic leakproof structure.

The increased shrink ratio allows using of heat shrink tubes TTK 4:1 for mounting on cables and strands with significant levels differences and complex shapes, while maintaining flexibility and elasticity of the assembly.

After melting and cooling the adhesive composition of tubes TTK provides excellent adhesion to almost any surfaces and materials. However, before installation, during storage and transportation, adhesion of layer is minimal, which prevents adhesion of the tubes one to each other

Adhesive lined heat shrink tubes TTK have high resistance to UV, weather conditions and approved for outdoor installation in areas with high humidity levels, as well as for installation directly into the ground and concrete.

TTK “KBT” shrink tubes 4:1 are supplied in convenient packing by 10 pieces (meter cutting) and presented in optimal size range, from 4\1 to 52\13 mm.

Being already widely known in the professional sphere, heat shrink tubes TTK “KBT” every year become closer and closer to the usual consumer, gradually acquiring the title of the national brand.