Waterproofing Suspended concrete slab

Waterproofing Suspended concrete slab  requires a number of materials


Waterproofing Suspended concrete slab Method

1. Prepare suspended concrete slab surfaces to be treated by removing any loose materials ensuring a clean and sound surface.

2. Any damage to the slab surface should be repaired using MAXREST.

3. Any missing mortar can be replaced with MAXREST

4. Any dummy, expansion or construction joints are to be filled with MAXJOINT ELASTIC and coated with MAXSEAL FLEX and MAXMESH  150 mm joint cover.

5. Hairline fractures up to 3.5mm wide can be coated with MAXSEAL FLEX without filling.

6. Apply MAXSEAL FLEX To a damp clean surface ensuring even coverage allowing the masonry substrate to follow the moisture into the porous surface, overlap 50mm onto MAXSEAL FLEX at joint.

7. Leave to cure for a period of 3 days minimum before the laying of the tile bed.

Sealing Below the Suspended Slab

Sometimes the slabs crack and water penetrates into the area below. Many cases the chances of completing a repair from the water side (top) is almost impossible. The cost of repairs prohibitively exorbitant. This means necessary repairs to stop the leak/s are often delayed or avoided  completely.
The only option is to seal your slab from where the leak is showing. This type of repair is usually a lot cheaper, maybe reduction as much as ten times.

Sealing a suspended Concrete Slab with Drizoro Maxseal Super

drizoro-maxseal-super-online-waterproofing-slabs-wall-dusting-mechnical-trowel-finish, Waterproofing Suspended concrete slab

First part of Waterproofing Suspended concrete slab this way is to spread the Drizoro Maxseal Super below the slab itself before the pour.

Second part of the application is performed on the fresh concrete, after leveling. The concrete slab has enough strength to be walked over. But still fresh enough to dampen the surface when troweled.
The product is spread in powder form as supplied at a ratio of 1,5 to 2,5 kg/m2, endeavouring to achieve a complete and uniform coverage. Immediately after the surface is sprayed to prevent the superficial drying of the slab and to make the power troweling smoother.
The troweling will provide a monolithic waterproof layer, which can be slightly dampened during this operation to improve the penetration. This prevents an excessively quick drying, which would prevent proper hydration of Drizoro Maxseal® SUPER.
Singular spots such as columns, penetrating pipes, corners, concrete joints, and expansion joints should be treated and sealed prior to general application. See below

Further Reference can be found to this process on the Drizoro Maxseal SUPER page


Protrusions & fixing to Suspended Concrete Slab


Seal around any protrusions using MAXJOINT ELASTIC

then coat with MAXSEAL FLEX and MAXMESH  150 mm joint cover.

Fix fittings & bolts to suspended slab using MAXGRIP










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, material safety data sheets available from our office or website. © DRIZORO S.A. All rights reserved.

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