How To Seal Internal Areas of Concrete Tanks Leaking Water

Specification for Repairing Concrete & Masonry Block Water Tanks  Leaking Water

Rigid Leaking Water Tanks:- Waterproofed InternallyWaterproofed Externally

How To Seal Internal Areas of Concrete Tanks Leaking Water Products required
MAXSEAL FOUNDATION | MAXSEAL FLEX  |  MAXREST |  MAXPLUG | MAXRITE 700 | MAXJOINT ELASTIC

Method for How To Seal Internal Areas of Concrete Tanks Leaking Water

Warning:- THIS IS YOUR LIFE –
You are entering a confined space for your safety before entering a water tank open all external drains and ventilate the tank to ensure the air is breathable!! 
Carbon Dioxide displaces Oxygen.

Oxygen required for life function is needed to continue breathing!

Note:- Tank should be structurally sound and leaking cracks not flexing.

1. Remove any loose material from the substrate. Pressure clean to remove any organic growth from the surface.

2. Any cracks or voids (wider than 1mm) should be ground or chiselled open, at recommended 20-25 mm wide and 20 mm deep with dovetail or square shoulders (see diagram below) and repaired with MAXREST. It is strongly recommended that if the crack is also apparent on the outside of the water tank it be repaired as per Method Repair for External Cracks

 Tank-crack-repair-and-strengthen

 

 

NOTE:- On old tanks reduction of structural of the strength of the tank is often the reason for the crack formation and to AVOID the crack reforming, in this instance, it would be strongly recommended that area surrounding the crack be built up using MAXREST restore some structural integrity and to create extra support (like a pillar) and spread the pressure created by the water, across a greater area, when full.

3. Floor-wall joints make a coving using MAXREST.

4. Apply the first coat of DRIZORO MAXSEAL FOUNDATION  or MAXSEAL FLEX  to the entire internal area and leave to cure overnight. (recommended 14 hours minimum between coats)

5.  Apply the second coat of DRIZORO MAXSEAL FOUNDATION  or MAXSEAL FLEX.  High humidity will affect the curing of Drizoro products, it is recommended that the tank be well ventilated or longer curing times will result.

6. Tank surface requires approximately 2.5 Kg of product per square meter. If this ratio has not been achieved a third coat may be required.( 1.25 mm per coat)

7. After the final coat has been applied leave for a minimum of 7 days when using MAXSEAL FOUNDATION or a minimum of 14 days with MAXSEAL FLEX before filling the tank with water

Commonly Used Products In Tank Repairs

Drizoro Maxrest Concrete Repairs

This product has multiple variants. Use to join floor wall Joints or Strengthen areas

Drizoro Maxplug – instantly stops running water

This product has multiple variants. Used here to stop leak in underground tanks

Drizoro Maxrite High Strength Mortar

Ideal to Strength tanks – has great flexing capability

Maxjoint Elastic Express for use in moving Joints

High bond strength can be used to complement the other product in use

Drizoro Maxseal Flex – Flexible Waterproofing membrane

This product has multiple variants. Used in Flexing Tanks

Maxseal Foundation – waterproof membrane coating

No variants. Used when the tanks has been stabilised