DOYMA Curaflex® combinations general overview

DOYMA sealing systems are composed of two components which perfectly fit together:

Curaflex® gasket and Curaflex® pipe sleeve

Example: Curaflex® combination 3300 for sealing against pressing water

Curaflex® 3000 special fibre cement pipe sleeve
Available in standard lengths of 200, 240, 250, 300, 365, 400, 500, 650, 1000 mm
Other specifications on request.
Curaflex® C gasket insert
Curaflex® combinations

Sealing against pressing water

Product Membranes/ bituminous
Without tanking With tanking In the wall On the wall face
CuraflaxCombinationsI1_01.jpg Curaflex® 3300
CuraflaxCombinationsI2_01.jpg Curaflex® 3300/T
CuraflaxCombinationsI1_02.jpg Curaflex® 3600
CuraflaxCombinationsI1_04.jpg Curaflex® 8300
CuraflaxCombinationsI2_04.jpg Curaflex® 8300/T
CuraflaxCombinationsI1_05.jpg Curaflex® 4300
CuraflaxCombinationsI1_06.jpg Curaflex® 6300
CuraflaxCombinationsI1_07.jpg Curaflex® 7300
CuraflaxCombinationsI2_07.jpg Curaflex® 7300/T

Sealing against non-pressing water

Product Membranes/ bituminous
Without tanking With tanking In the wall On the wall face
CuraflaxCombinationsI1_03.jpg Curaflex® 3100
CuraflaxCombinationsI1_10.jpg Curaflex® 8100 *
CuraflaxCombinationsI1_10.jpg Curaflex® 8100/T *
CuraflaxCombinationsI1_11.jpg Curaflex® 4100
CuraflaxCombinationsI2_13.jpgCuraflex® 5100
CuraflaxCombinationsI1_13.jpg Curaflex® 5.5102
CuraflaxCombinationsI1_14.jpg Curaflex® 7100
CuraflaxCombinationsI1_14.jpgCuraflex® 7100/T
CuraflaxCombinationsI1_12.jpg Curaflex® 3101

* with bituminous thick coating

Pressing / non-pressing water

Pressing water – water which exerts hydrostatic pressure (even if limited in time, e.g. accumulating seepage water) on the structural element with the feedthrough. Groundwater and floodwater are typical water types. Non-pressing water – water which does not exert any hydrostatic pressure on the structural element with the feedthrough. Capillary water is a typical water type.

Without tanking membranes / bituminous coating (white tank),
with tanking membranes / bituminous coating (black tank)

Non-waterproof structures must be protected with a sealing coat against penetrating water. This sealing coat can be in the form of sheeting, trowelable or liquid-applicable masses and therefore results in a skin-type seal. Since bitumen plays a major role in terms of materials, these forms of seals are often known as a “black tank”. Waterproof or non-water-permeable structures do not require additional skin sealing. This type of structure includes those using impermeable reinforced concrete. This type of structural waterproofing is also known as a “white tank”.

Installation in the wall / in front of the wall

The wall thickness is normally sufficient for installing a Curaflex® pipe sleeve. In this case, the sealing system is also located in the wall. If the wall is too thin, or the costs too high, to adapt the wall feedthrough for inserting a pipe sleeve and a gasket insert appropriately, it is recommended that the system is installing on the face of the wall

Installation of Curaflex® combinations

Installation example of Curaflex® 3300

Maximum torque for Curaflex® A – F gasket inserts.

bolt Ø wrench width Maximum torque
M 5 8 3 Nm
M 6 10 8 Nm
M 8 13 12 Nm
M 10 17 25 Nm
M 12 19 30 Nm

Curaflex® Combination 3300

Curaflex® Combination 3300.

Please note before installing the pipe sleeve:

  1. If Curaflex® 3000 or 3000/T or a gasket insert is fixed in a special fibre cement pipe sleeve which is not yet concreted in place, this should only be slightly pre-tightened. Otherwise, the pipe sleeve could be damaged. Once concreting is complete, tighten the gasket insert with the specified torque.
  2. If the service line has already been laid, then the pipe sleeve must be positioned centred around the service line and fixed before concreting.
  3. If possible, place pipe sleeves at a spacing of minimum 10 cm between each other during concreting so that compaction of the concrete/mortar is easier; also observe a spacing of 10 cm between the pipe sleeve and the breakthrough borders when installing in existing walls.

Before installing the gasket insert, please note:

  1. Curaflex® gasket inserts are maintenance-free. Re-tightening the bolts is not necessary if installed correctly.
  2. Does the gasket insert fit? Compare service line and pipe sleeve diameters with the information on the gasket insert.
  3. The nut side of the gasket insert should be facing the dry side of the wall.
  4. Gasket inserts are not fixed points or supports, but are exclusively intended for elastic sealing of service lines.
  5. Slight axial movements of the service lines are permissible.
  6. The seals and pipe services must be clean and free of damage.


  1. DOYMA products are continuously being further developed, technical changes will take place without previous notification.
  2. Extensive installation instructions are provided with the product.

Curaflex® 3300 is a pipe penetration system for sealing off service lines against pressing water. The system consists of a Curaflex ® C gasket insert and the Curaflex® 3000 pipe sleeve. It can be built into walls, ceilings or bases in sealing systems without sealing sheets or bituminous coating.

Installation of the pipe sleeve during shell construction


Fix the pipe sleeve in the shuttering using Curaflex® 1701. 2 shuttering aids are required for each pipe sleeve.


Example: fixing into steel shuttering using welded connections with pipe clamps (pipe clamps provided on site).


Example: walling in.


Ensure concrete around pipe sleeve is well-compacted.


Use Curaflex® 1702 protection cap to protect the pipe during the shell construction phase.

Installation of the gasket insert


Push the gasket insert over the service pipe in the annular gap.


Position the gasket insert on the water side.


Tension the gasket insert nuts using a torque wrench (note Fig. 9).


Tighten the bolts diametrically opposing. Note maximum torque.