Pre – formed cuff closing, they are watertight and provide a total air and water seal of the gap between the duct and the protective pipe or between the line pipe and the hole in the wall.

They are produced in nitrile rubber, also known like NBR or Buna-N, it has been formulated for use in the field of hydrocarbons and is widely used in the oil and gas natural industries, in water and sewage systems or for applications where high resistance to mineral and vegetable oils is required.

Pre – formed cuff closing, are available in different measure and they have an wide range of applications.

Their range and flexibility is the ideal solution for almost all types of applications, offering:

  • Easy and quick installation on every kind of pipe.
  • Positive Hydrostatic pressure resistance up to 1 bar.
  • Electrical insulation of pipes (cathodic protection).
  • Absorption of vibrations, impacts and noise.
  • Increase in line tube stability and fastening.
  • Oil resistance.
  • Quick and easy installation by a single operator without the use of special tools.


The typical values given are the average of minimum and maximum values defined by Coatec s.r.l. for acceptance of the product. The values measured according to standard procedures, are obtained from specimen of samples collected according to Coatec s.r.l. test procedures, and conditioned under controlled conditions. In absence of purchasing specifications for the inspection and acceptance of the product, Coatec s.r.l. will refer to its procedures, conditions and tolerances. Values obtained on site will vary depending on the test methods and conditions. Whilst Coatec s.r.l. warrants its products to be free of material and manufacturing defects, Coatec s.r.l. disclaims any liability in connection with the misure of Coatec s.r.l. products.