Waterproofing Water Bearing Positive and Negative Side Masonry Surfaces
Suitable Surfaces
- Sufficiently aged and cured, porous virgin mortar, screed and plaster of recognized building mix standards.
- Good quality virgin porous cement and clay bricks.
Weather Conditions
Do not apply to exterior surfaces if rain is imminent during high winds or freezing temperatures.
Surface Preparation
- Remove any efflorescence whilst dry using a stiff bristle scrubbing brush.
- Clean the surface - remove dust, dirt and all other foreign matter.
Mixing
- Pour 5 litres of clean water into a clean plastic container.
- Sprinkle 5 kg* Coprox Masonry Waterproofing slowly into the clean water stirring constantly until smooth and free of lumps. Use immediately. To prevent settling, stir frequently throughout the application.
First Coat
- Thoroughly wet the surface with clean water. Surfaces which are already wet as a result of damp or rain, do not need to dry before application commences.
- Liberally apply the Coprox Masonry Waterproofing to the wet surface using a suitable brush. Ensure all depressions, fine cracks and pin holes are covered.
- Once the Coprox Masonry Waterproofing visibly begins to dry, cure the application by evenly wetting it with a fine mist spray. Repeat this procedure one or more times to minimize crazing and powdering. In hot climates or high temperatures, cure the application more frequently.
Second Coat
- Apply the second coat 6 - 8 hours or more after curing the first coat.
- Wet the first coat with water and apply in the same manner as before.
Coverage - 2 Coats
2,6 m2 per kg (approx.)
Powdering
The structure will only absorb sufficient Coprox Masonry Waterproofing as is necessary to render it waterproof. Powdering after curing may therefore occur. Simply dust or wash off the excess.
Filling Swimming Pools, Ponds, Reservoirs & Water Features
- Remove any excess powder
- Thoroughly hose down the surfaces several times with generous amounts of water, 24 hours or more after the second coat has been cured.
- Mop up the water.
- Fill with clean water.
Toxicity
Once cured, Coprox Masonry Waterproofing is non-toxic and therefore not harmful to human, animal or plant life. The water must be free of any excess powder and allowed to age sufficiently and treated chemically before introducing fish or plants. Consult your local pet shop or water authority in this regard. In the case of swimming pools, pH levels should be properly maintained. All chemicals should be added via the weir. Decorative Finish
Where Coprox Masonry Waterproofing is used as a decorative finish, it is still applied in exactly the same manner as a waterproofing application. For aesthetic purposes however, the application should only start once all building or renovation work has been completed, as cement coatings cannot be easily touched-up once dry without leaving noticeable patch marks.
An entire wall (corner to corner) should be completed without interruption. Cutting around window and door frames, light fittings and cornices must be done as and when they are encountered and not prior to application.
Work in manageable sections. Do not allow previous sections to dry before continuing with subsequent sections - overlap marks will be noticeable if wet and dry edges of sections overlap each other. Work section by section and complete the entire surface area without interruption.
On high walls or large surface areas, one applicator should apply from the top down, while another applies from the bottom up, or one applicator applies from the left side and another from the right.
The same colour must be used for both the first and second coat. The second coat may appear lighter than the first coat.
Cleaning Tools & Equipment
Use clean water. Product and waste water containing product should not be discharged directly into drains and waterways.
*Packaging
1 kg & 2 kg Cardboard Box; 5 kg Heavy Duty Plastic Pocket.
Storage & Shelf Life
12 months when stored sealed in a dry place.
Identification & Composition
A non-flammable cement based powder (in various colours) containing Portland cement, calcium chloride, titanium oxide, silica sand and other minor constituents.
Rain Penetration Test
SABS 0400:1990 report available upon request.
Precautions
- May irritate eyes or sensitive skin. Gloves and goggles should be worn.
- Keep out of reach of children.
First Aid
- If swallowed in significant amounts, induce vomiting, otherwise rinse mouth and drink milk. Consult a doctor.
- If inhaled, move patient to fresh air. If respiratory irritation, dizziness, nausea or unconsciousness occurs, seek medical assistance immediately.
- Eye Contact - flush thoroughly with water for at least 15 minutes. Consult a doctor.
- Skin Contact - wash contact areas with soap and water and apply aqueous cream.
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