Waterproofing basement walls

Waterproofing basement walls

WP7-501 Wall + Basement Waterproof allows you to tackle the most difficult moisture problems. The only solution for wet stains or loose plaster due to moisture in basement and walls.

Step 1: Preparation

Remove all of the coating, this can be done with a hammer and chisel or with a hammer drill.
After removing the coating, brush the wall with a steel brush or with a drill and a cup brush.
Once the wall is clean you remove the dirt and apply a floor protection.
The floor protector will absorb spills from the product, once the product is cured, it can only be removed mechanically.

Step 2: Primer

Prepare the sealing primer with a ratio of 1:1.
- (For the wall we will treat in this example: dilute 0.5 l of primer with 0.5 l of water.)
- Mix the two together in a container with a nebuliser.
Apply the primer to the wall to be treated, also wet the corners.
After applying the primer you will notice a “glazing” effect after a while.

Step 3: Mixing

Measure out the appropriate amount of water and pour it into the mixing vessel.
Now add the polymer cement in stages and mix both using a drill with a mixer attachment.
Repeat adding and mixing until you have processed the right quantity to form a homogeneous mass.
Let it stand for 2 minutes, then mix again with the mixer attachment.
At basement temperature (17.5 ° c) the mixture is workable for one hour.

Step 4: Application

Humidity during application and curing must be between 50% and 80%.
Firmly apply the first coat of +/- 1 mm to the still wet primer, using a wide stiff brush.
After applying the first coat leave for 2 to 5 hours.
The first coat must feel cured before applying the second coat.
Apply clean water to the first coat using a spray.
Make sure that the entire wall is wetted.

Step 4: Apply 2nd coat

You have made your second batch according to the right mixing ratio and in the right way
Apply this (+/- 1mm thick) with a wide stiff brush or a smoothing trowel. This is very subjective, i.e. depending on the result you want to achieve in this area.
If you use a brush, make sure you apply the 2nd coat at right angles to the brush direction of the 1st coat.