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ACS Leakseal is a unique proprietary blend of latex emulsions mixed with additives to promote flow and adhesion. It is a quick and effective means of controlling the flow of unwanted water into or out of:

  • Basements
  • Shafts
  • Lift wells
  • All types of tunnels
  • Building foundations and conduits
  • Swimming pools
  • All types of dams and reservoirs
  • Bore holes

The ACS Leakseal system succeeds where conventional methods have failed. The emulsion is stable until activated when it breaks down and the colliodally dispersed rubber coagulates to form a jelly-like mass of rubber particles. It contains no toxic or hazardous material other than less than 0.5 percent ammonia solution, which is present as a preservative.


The reaction of ACS Leakseal with the water depends on the characteristics of the water, such as pH, salinity, mineral content, temperature etc. The formulation of ACS Leakseal can be varied to achieve the desired reaction with the specific water being treated. It is therefore highly desirable to carry out tests with water from the area to be treated prior to finalising the formulation.


To seal leaking concrete structures, basements and lift wells, ACS Leakseal is injected through the concrete into the water side of the structure where it is dispersed into the water. The water then carries the solution into the concrete.

As the emulsion flows with the water along the crack or fissure it will be activated over a couple of days and a steady build up of coagulated rubber laths occur which then form a seal. In mines, shafts and tunnels, ACS Leakseal is injected into the water flowing in a crack or fissure via a hole drilled to intersect the crack or fissure for this purpose. A packer is inserted into the hole through which the injection of ACS Leakseal is done.

If conditions dictate, then a chemical activator can be injected, either down stream from the ACS Leakseal injection point, or at the same injection point, through a different port in a multiport packer.

Because of the flexibility of the rubber plug, the build up of water pressure behind the plug forces the plug tighter into the crack of fissure, thereby improving the sealing effect. The result is a permanent barrier which prevents water from entering the concrete, thus not only stopping leaks, but also preventing concrete cancer.


ACS Leakseal is exceptionally durable – once activated, it becomes inert and will remain in situ until physically removed. Ultra violet light, however, will break down the material after prolonged exposure. It is therefore not recommended for use in direct sunlight without a protective coating.

ACS Leakseal remains flexible and will therefore remain effective even when structure movement occurs, unlike other types of grout that react to set hard and may crack during movement and allow leakage to resume.


The ACS Leakseal solution is completely non-toxic and can therefore be used in the proximity of plants and even drinking water sources. Spillage can be activated and removed as solids. Because ACS Leakseal can block drains and pumps it must be prevented from entering drainage systems and pump inlets.


The ACS Leakseal treatment is cost effective, and compares favourably with the cost of sealing with cement. The differences are that ACS Leakseal requires much less time, and that much finer passages can be penetrated and sealed. In addition the new seal remains flexible allowing for structure movement in the future.


The positive sealing effect of ACS Leakseal makes it possible for experienced personnel to predict the likely success that can be achieved after careful inspection and evaluation of each water flow problem. Contracts for water sealing can therefore be negotiated based on success rate actually achieved.


Hotel basement before sealing with ACS Leakseal

Hotel basement after sealing with ACS Leakseal