Composite flexible links

Composite flexible links are used in construction to connect the inner wall with the facing layer through insulation in a system of three-layer walls.

According to SNiP II-22-81 "Stone and masonry structures", item 6. 31: "Flexible connections should be designed with corrosion-resistant or corrosion-protected steels and also with polymeric materials".

This SNIP indicates that the use of non-corrosion resistant fittings, fittings made of ferrous metal and wire as flexible ties is dangerous, since their corrosion, leading to the collapse of the facing walls, affects the safety of the building. This condition is unsafe and living in the building is life-threatening due to the real possibility of collapse.  It is time-consuming and costly to repair such a failing building, which is not economically viable.

Comparative table of characteristics of fiberglass flexible ties.


Carbon Steel


Stainless steel

Tensile strength, MPa




Thermal conductivity


Less than 1.0


Fire resistance, °C

up to 600

up to 1000

up to 600

Electrical conductivity

conducts electricity

does not conduct electricity

conducts electricity

Magnetic characteristic


Does not magnetize






Reliability indicators

low corrosion and chemical resistance

high corrosion and chemical resistance

high corrosion and chemical resistance


Flexible links are made using an anhydride type hardener.

Example of designation : FFC-XXX-X-SA, where:

  • FFC - flexible fiberglass connection,
  • XXX - link length (in mm)
  • X is the diameter of the connection (in mm)
  • SA is a solid anchor section with a bi-directional "cruciform" periodic profile.

At the request of the consumer, it is possible to manufacture ties of a different length and diameter.
Packing of 50 pieces in polyethylene or cardboard packaging.