All types of water stop and how to use it in detail

All types of water stop and how to use it in detail

All types of water stop and how to use it in detail

A waterstop sealant is a roll of plastic (and there are metal ones), twenty to thirty centimeters wide, and the length of the reel is about 30 linear meters, and its purpose is to prevent leaks at the level of the flow separator or expansion joint, the sealant is mainly and effectively used in water installations In abundance due to the multiple uses of concrete structures in the field of infrastructure, and in this article we will learn about the use of waterstop sealants.

waterstop sealant

It is a plastic roll with a width of twenty to thirty centimeters, and the length of the roll is about 30 meters, and there are different zigzags and protrusions according to the need for use.

What are the uses of Waterstop Sealant?

  • It is used when pouring the floor of the water tank, and a part of the tank is placed on the side of the tank wall, about 12 cm, and the rest is visible to the top and is inside the tank wall when pouring concrete.
  • The sealant is used when there is any separation inside the floor, the walls of the water tank or the swimming pool.
  • Its purpose is to prevent leakage in the casting joint or expansion joint.
  • Sometimes the waterstop sealant is made of metal and is used inside the Tyrode installed to form the walls of the tank.
  • It is used when pouring reinforced concrete for the bottom of the water tank, as it is placed at the bottom of the tank from the side of the tank wall, and part of it is about 12 cm. It is installed in the Balkans and the rest is visible to the top and penetrates the wall of the tank when pouring concrete or placing it when pouring the wall in two stages between the previous concrete and the next stage.
  • In general, waterstop sealants are used to seal off water when there is a break in the floor, walls of a water tank or swimming pool.
  • Once the pour is complete, it should be noted that the areas of the pour joints are the weakest areas through which water seeps, whether horizontal or vertical, such as ceilings, floors or walls, which is why an auxiliary element had to be sought to prevent these problems from occurring.
  • In general, a water seal is used when there is a joint in the floor or walls of a water tank or swimming pool, and its purpose is to prevent leakage in the casting joint or expansion joint.
  • We also use it in two-stage cast concrete walls, and there are concerns that the concrete separator resulting from the pouring stop will cause water leakage.
  • It is laid in such a way that the lower half is poured into the first part of the wall and the upper half is left uncast to be poured while completing the concrete wall such as swimming pools, water tanks and basement walls.
  • It can also be used in concrete floors that can be poured in two stages such as reinforced concrete grout, which is preferred for non-stop oasis phase pouring, hanging from an overhead iron rod through the holes in the tape by attaching it with wire tie
  • Generally, a water stopper is used anywhere there is water, whether the water is indoors or outdoors.
  • It is one of the lines of defense against water, but not the only one Since any structural fracture in the skeletal organ is considered a vulnerable area, care must be taken to prevent water from entering or entering the organ.
  • It can be used with a water sealer of some chemicals to bond old concrete with newer concrete, but not always as it cannot be used just before pouring.

What are the layers of the types of water stops?


It acts as a barrier in front of the seepage path in the joint due to the large number of fins intertwined with the concrete, making it difficult for the seepage to take the more complex, winding and more difficult paths.

waterstop sealant sites

Separator between the base and the wall.

Floor slab casting spacer.

Best horizontal molding in walls.

Separator for vertical casting in walls.

Casting spacer between walls and ceiling.

waterstop sealant strips

They are longitudinal slices of different sections, shapes and sizes made of different materials and plastic granules. In the past, they were made of plastic granules called (perlite granules), and recently they were made of some advanced materials such as PVC crystals and UPVC crystals.

And the fact that this type of insulator is needed made it possible to avoid certain defects in the technology of the structural construction stages in many parts of the building, such as the expansion joint where the pouring stops at specific stages and we need to follow it later, creating a special area that requires treatment, or pouring joints between the pouring steps Concrete elements, such as the separator between the cast floor and the structural joint wall, which results in a small, possibly invisible crack between the pre-stop poured concrete and the post-cast concrete.

How to use waterstop sealant

As we mentioned earlier in the areas of the horizontal casting joints, we install the water plug through the holes between its sides by means of a metal tie on the reinforcing steel mesh in the middle of the separation area so that after the completion of the initial casting step, one half is poured and the other visible, and in the areas of the casting joints Vertical, we install it on the rebar in the middle so that the half is at the stage at which the casting stops, and when the casting is resumed, the other half is poured with the first step and the remaining half with the start of the resumption of the casting step.

As for the most important types of water stops, it is the type used in the areas of construction joints between horizontal and vertical formwork, for example, between floors and walls of basements, spit tanks, swimming pools and water basins, between concrete ends submerged at different times.