How to Waterproof a Leaking Water Tank
Waterproof your Water Tank in 8 Simple Stages
Stage 1: Empty the Tank
Use a submersible pump to empty tank
Stage 2: Water Blasting
Wash/water-blast the entire surface.
Stage 3: Pre Cut GEO Textile
Identify cracks, holes, corners or wall floor joins, then pre cut Geo-Textile to bridge the defects.
Stage 5: Waterproof Sealant over GEO Textile
Stage 6 First Coat of Waterproof Sealant
Apply the first Coat of Waterproof Sealant onto the entire wall by brush, roller or spray maschine.
Stage 7: Second Coat of Waterproof Sealant
Apply the Second Coat of Waterproof Sealant onto the entire Wall.
Step 8: Heavy Coat to the Floor
Apply a heavy coat of Waterproof Sealant to the entire floor.
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1. Use a submersible pump to empty tank
2. Wash/water-blast the entire surface.
3. Use a wet and dry vacuum to empty the remaining water out
4. Ensure to use a fan forced ventilator in tank to ventilate and to start the drying process.
5. Identify cracks, holes, corners or wall floor joins, then pre cut Geo-Textile to bridge the defects.
6. Apply a first coat of Waterproof Sealant with brush, roller or LRDIY spray machine to cracks, holes, corners or wall floor joins before embedding the pre cut Geo-Textile - ensure you brush the air from underneath the applied Geo-Textile and make sure there are no crinkles. Refer to the full video below
7. Ensure to also apply Waterproof Sealant to pipe outlets and to just above maximum waterline (not joining the roof of tank).
8. Recommended to use Rapid Cure Spray to instantly set the product and to assist to speed the job up (ensure Rapid Cure Spray is dry before apply second coat with brush or roller). Watch the rapid cure video to see how this is done.
9. Apply a second coat of Waterproof Sealant to all the above areas (cracks, holes, corners, wall floor joins). If fully encapsulating the entire tank surface - more coats can be applied. Recommended to have a 1.5mm-2mm dry-film thickness (2 ltrs./sq. metre).
10. IMPORTANT - Before filling tank back up with water, Waterproof Sealant must be cured 7-10 days minimum or as long as possible - longer during cold weather.