Water tank

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External tank waterproofing

What do we need?

We refer to waterproof water tanks made of concrete, which is done from the outside. Many times the concrete after curing creates hairline cracks (<1mm). Even there may be increased porous in concrete. Finally these defects may be present as large cracks (2 – 5mm). In all these cases there is water leakage through the walls of the tank, which among other things can have devastating effects on the strength of the reinforcement and concrete.

How do we do it?

Because cracks in the walls of the concrete show contractions, for insulation used an elastomeric waterproofing bituminous membrane.

Products used

WRM 518
BORNIT-DREIECKSBAND
PALLADIEN ALU (-20 οC)
THRAKON Bitu-PRIMER
NEODRAIN SL28C

Step by step

STEP 1: Clean the surface from oil, dust and loose particles. In case of existing reinforcement, we cut it at a depth of 3 cm. Then wet the area with water and proceed with the repairing of the surface by using WRM 518

STEP 2: At the points of intersection of concrete walls with foundations the application of BORNIT-DREIECKSBAND is suggested. This is a bituminous, highly flexible, triangular tape, ideal for these parts of waterproofing

STEP 3: Application of bituminous membrane THRAKON Bitu-FELT V (-5 oC)

STEP 4: Application of bituminous varnish Bitu-Primer, leaving it to dry for 8 – 10 hours

STEP 5: Application of a new layer of bituminous membrane THRAKON Bitu-FELT V (-5 oC). STEP 6: Application of NEODRAIN SL28C, in order to protect the surface

Products used : Repairing mortars Waterproofing

Ιnternal Tank Waterproofing

What do we need?

We refer to waterproof water tanks made of concrete, which is done from the inside. Many times the concrete after curing creates hairline cracks (<1mm). Even there may be increased porous in concrete. Finally these defects may be present as large cracks (2 – 5mm). In all these cases there is water leakage through the walls of the tank, which among other things can have devastating effects on the strength of the reinforcement and concrete.

How do we do it?

Because cracks in the walls of the concrete show contractions, for insulation used an elastomeric waterproofing 2 components emulsion, which has high elasticity.

Products used

GLX 292

WRM 525

DSF 350 FLEX

Step by step

  • Remove loose parts of concrete from the walls or the floor of the tank. Wash and remove any molds and algae developed in concrete surfaces.
  • Priming with high penetration acrylic primer  GLX 292 FLEX PRIM all surfaces on which to apply the materials. Large cracks (> 5 mm) and gaps filled with the repair mortar WRM 525.
  • When the surfaces thoroughly dry with stiff brush or roller apply in two layers crosswise, the waterproofing two component emulsion, DSF 350 FLEX.
  • If necessary we apply two additional layers to protect against high hydrostatic pressures. Each layer is applied onto the preceding when it is dry.
  • The tank can be filled with water, after complete drying of the material (7-10 days).

Products used : Repairing mortars Waterproofing

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