Issue:
- A concrete bomba tank with 7m height is built inside the building and filled with > 120 m3 of water.
- The high water pressure inside the concrete tank has resulted in water seepage through the wall.
- The outer wall became moist due to the leak; paint fell from the wall and fungus started to grow.
Inspection Result:
- Suspected that the 2K waterproofing applied in the inner side of the concrete tank was scratched or damaged during the construction.
- Since the water tank was already filled up with water, we could only repair the leak from outside (so-called the ‘negative side’).
- Proposed to use our Waterborne Crystallization Waterproofing product which is Builden Infuseal and Builden SeepBlock Seal
Application of Builden SeepBlock Seal
Method Statement for bomba tank (negative side) wall using Builden SeepBlock Seal:
a)Substrate Preparation:
To clean the substrate to be free from grease, oil and any foreign material, including loose particles prior to waterproofing work commence.
Substrate surface shall be clean by high pressure air or water jet to remove all laitance and unsound material.
b)Apply 1 layer of Builden Infuseal
c)Apply 1 layer of Builden SeepBlock Seal
1 Day After Application of Builden SeepBlock Seal
- Still can see watermarks: Application won’t take immediate effect because Builden Infuseal and Builden SeepBlock Seal are both crystallization products.
- They need to absorb into the wall to fill up the crack lines in the leakage area and form crystallization.
- The whole process will take up to 1 week to complete.
1 Week After Application of Builden SeepBlock Seal
- The wall dried up: When the wall is no longer wet, it means that there is no more water seeping through the wall.
- We applied Builden B200 Elastomeric Paint to paint the wall and seal up the wall.
- This means that both Builden Infuseal and Builden SeepBlock Seal both SUCCESSFULLY formed crystallization from the negative side to prevent water from seeping out.
