Waterproofing Repair/Resurfacing/Refurbishment/Decorative Surfaces – Concrete Swimming Pools Repair.

Specification New Concrete Pools  | VIDEO

Waterproofing concrete swimming pools repair – where water penetrates the pool shell or the finished coating such as Tiles, Marblesheen, pebblecrete or other surfaces, where due to variations in finished pool surface quality or poor pool management  the development of penetrations in the finish over time can occur eg. faulty mortar lines in a tiled pool.

Presence of ground water from behind the coating from outside the pool shell may cause further delamination of pool finish. This is why any waterproofing and repair material used in a swimming pool shell must be able to withstand the pressure from the swimming pool itself and also the presence hydrostatic pressure from groundwater.

NOTE: Repair products must also chemically resistant to the pools chemicals.

Full inspection of the pool before carrying out any repair of the concrete pool surface is critical. Due to raw material variations, less than satisfactory application techniques, marblesheen additives, faulty mortar lines, poor quality tiles, and surface deterioration. Inspect the surface carefully for soundness. Where the inspected surface is crumbly, soft, or drummy in any area, it must be removed as it is suspect and may interfere with the final coatings stability.
Such areas are repaired using Drizoro Maxrest where there is no presence of ground water. Should groundwater be present or faulty area is leaking Drizoro Maxplug is recommended.

How to refurbish concrete swimming pools

Products required to refurbish concrete swimming pools 


CAUTION: The following preparation details MUST be adhered to for the successful adhesion of MAXSEAL FLEX.


1. Prepare area to be coated by removing any loose materials ensuring a clean and sound surface, free from efflorescence, laitance, organic growth and other contaminants.

2. Apply MAXREST PASSIVE  to exposed steel to protect against corrosion.

3. Any damage to the surface should be repaired using MAXPLUG, where leaking, or MAXREST where there are no leaks

4. Using a “RIPPER” disk with a 24 grit minimum abrade the total surface to create an open porous base.
Use commercial Hydrochloric or Muriatic Acid to etch the surface thoroughly, a small area at a time.
Immediately scrub the entire surface with a NYLON  broom. When the bubbling reaction stops (approximately 5-15 minutes), flush the entire area with fresh water.
NEVER ALLOW THE ACID RESIDUE TO DRY ON THE SURFACE after the surface has been etched correctly, the surface needs to be neutralized with a solution of Bicarbonate and water (1Kg Bicarbonate 10 litres warm water) flush with clean water.
It is important to concentrate on a small, workable, section at a time. This will ensure that no bicarbonate of soda is deposited onto the surface.

5. Thoroughly wet the entire surface before applying the first coat of MAXSEAL FLEX. The MAXSEAL FLEX is a flexible cement-based waterproof coating that will not only prevent moisture from escaping the pool but will also prevent ground water from entering the pool.

6. Leave over night between coats.

7. Dampen surface before applying second coat.

8. When rendering over MAXSEAL FLEX a slurry coat of neat Bondcrete mixed with cement should be “flick” applied to the surface to assist with adhesion.

9. Allow 5-7 days to cure before finishing the surface.

For further information on how to refurbish concrete swimming pools please don’t hesitate to contact via this page or by phone

Waterproofing Concrete Swimming Pools Repair

Video shows the finished coating of Drizoro Maxseal Flex on a refurbished swimming pool in a residential complex in Barcelona.

How to use Drizoro Maxjoint Elastic & Maxseal Flex to make ready for rendering a swimming pool

Note – DRIZORO products are suitable for use with many popular pool-finishing products including tiles, pebblecrete and decorative renders.

Contact us now if you require any further information.

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Note – This information is based on information from the manufacturer and from our own experience. The information contained in this specification should be used in conjunction with the appropriate technical data bulletins and material safety data sheets available from our office or website. © Scientific Waterproofing Products Pty Ltd. ABN: 155 659 948 Address: Unit4/92 Bryant Street, Padstow, NSW 2211, AUSTRALIA  Tel: +61 2 9771 0011 Fax: +61 2 9771 0111  Email: admin@swppl.com.au  National Hotline: 1300 303 301 National Faxline: 1300 369 932 http://swppl.com.au/

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