Waterproofing Bathrooms Wet Areas

Waterproofing Bathrooms, Laundry’s and kitchens are usually the wettest rooms in any house. Wet areas when not waterproofed correctly structural damage to your building structure will occur. The moisture can even attract white ants which love damp areas. This why it is critical that the best waterproofing materials are used for waterproofing bathrooms wet areas.

The average age of a bathroom is approximately 10 years before it’s renovated. In fact this makes it one of the most commonly renovated rooms in the house. Fortunately or unfortunately Australian Standards AS 3740 apply to any waterproofing used. The unfortunate part is that many standards represent only the minimum requirement for the treatment.
The following information is designed for practical advice to when you can use:

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1. Drizoro Products for Bathrooms and Wet Areas

  1. Bonded  using Drizoro Maxseal Flex  A Coving using Drizoro Maxrest, (similar to a cornice)
  2. Drizoro Maxmesh embedded in Drizoro Maxseal Flex to strengthen the floor wall joint to protect against movement in the joint.
  3. Final coating of Drizoro Maxseal Flex
  4. Allow to cure.

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Typical Wet areas waterproofing for bathrooms where there are concrete and masonry surfaces

Drizoro cementitious products are ideally suited for the waterproofing of masonry and concrete surfaces.


2. Traditional Waterproofing Bathrooms Wet Areas

Liquid sealants such as polyurethanes are normally applied in a similar fashion to cementitious system or a 2 coat paint. Often a primer may be applied to the area first. The first coat of polyurethane is applied from left to right (horizontally). The second coat polyurethane is  finished, using up and down strokes (i.e. vertically). This ensures any small/pin holes missed in the first coat are completely sealed. Use Flexible sealant around the bathroom where the bath and vanity units meet the walls. This prevents water getting behind them and causing premature damage.


  • Waterproofing bathrooms wet areas with products which may take a few days to dry or cure, usually this is just a day or 2, check with supplier to make sure, so that you get the correct waterproof seal.
  • Don’t disturb the waterproof membranes whilst they’re curing. The plumbing works are to be completed prior to the wet areas waterproofing. The biggest danger to a waterproof membrane is the destruction by other trades.
  • Tiling should started only after the waterproofing has completely cured

3. Repair of Bathrooms and wet areas

Repair of Bathrooms and wet areas normally is a renovation which involves a complete makeover of the bathroom. Renovation occurs when tiles, wall panels etc. are replaced. The repair is really just like waterproofing bathrooms an brand new wet area. This can be expensive.

Repair of leaking bathrooms varies from bathroom to bathroom. The faults can be simple or complex. A little silicon often solves the problem

In other cases replacement of mortar line with a waterproof mortar, ordinary mortar and clear sealant applied to the entire tiled area. showers sealtight-clear-concrete-sealer-mortar-tile-sealers, waterproofing bathrooms Wet Areas

4. How to Make your Shower Watertight with Sealtight Clear 

7 reasons why SEALTIGHT is different to other Clear Sealers?

SealTight best clear sealer because it is made to an environmentally safe Scientific Formula using proprietary ingredients. Once absorbed into the concrete it fills the pores and blocks moisture from coming through the matrix. SealTight becomes part of the concrete chemical matrix and actually increases the strength of the masonry.

Method: – clean the shower to remove grease, unsound particles, scrub thoroughly to remove all the scrum and mould. Replace all silicone sealant as necessary around shower fittings etc. Bluee-Powerclean is recommended for cleaning. Rinse off all

Check all mortar lines for cracks or holes and where faulty replace with waterproof mortar such as Drizoro Maxjoint Flex – waterproof mortar
Wall floor and corners make a small coving for the entire length of the joint. (Drizoro Maxjoint Flex )

Once all the preparation is completed  ALLOW SHOWER TO DRY (at least 24 hour) before application of a saturation coat of Sealtight to the entire area.


Repair of Bathrooms and wet areas like all waterproofing requires the correct selection of the proper waterproofing materials. This then gives us the best result. The resultant protection of areas surrounding your bathroom wet area is important.
When is the repair of bathrooms and wet areas is necessary?  Bathroom repairs are necessary when ever water is getting past the membrane. It is important to know exactly what causes the problem. Then repair of waterproofing bathrooms is able to be made correctly.



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