Coprox Waterproof Dualcoat

  • Preventative & Remedial Waterproofing for Water Bearing Positive Side Surfaces
  • Decorative Textured or Skim Coat Finish
  • Suitable for Brick, Mortar, Screed, Concrete, Plaster, Painted Surfaces, Dry Wall Partitioning and Clay Tiles
Product Description

Coprox Waterproof Dualcoat is an easy and effective cement based waterproofing or decorative wall and floor coating suitable for commercial and domestic applications.

It is ideal for the waterproofing of water bearing positive side surfaces or interior surfaces such as bathrooms, showers and kitchens. Coprox Waterproof Dualcoat provides waterproofing and an aesthetically attractive decorative finish all in one step. It eliminates the need for plaster, paint and tiles, providing an attractive and unique naturally aged, mottled and rustic finish, which becomes more pronounced over time.

It is available in a wide range of striking colours. It can be brush applied as an elegant textured finish to a variety of surfaces or can be trowelled to a classic glass smooth skim coat finish onto walls, floors and over clay tiles.

   
Application
Waterproofing Water Bearing Positive Side Surfaces
   
Brush-on Textured Finish

Suitable Surfaces

  • Sufficiently aged and cured virgin mortar, screed, concrete and plaster of recognised building mix standards.
  • Good quality virgin cement and clay bricks.
  • Good quality paint.
  • Virgin clay tiles.
  • Dry wall partitioning.

Surfaces should be rigid to avoid cracking.  If in any doubt as to surface suitability, do a test area first.

Weather Conditions

Do not apply to exterior surfaces if rain is imminent, during high winds or freezing temperatures.

Surface Preparation
Masonry Surfaces

  1. Ensure the surfaces are free of any negative moisture. Should this not be the case, the surfaces must first be treated with Coprox Masonry Waterproofing or if necessary, plastered with Coprox Waterproof Cement Additive added to the plaster mix before proceeding with the application. Surfaces such as boundary and retaining walls must also be treated in this manner before the application commences.
  2. Remove any efflorescence whilst dry using a stiff bristle scrubbing brush.

Painted Surfaces

  1. Surfaces should be a good quality paint.
  2. Ensure no negative moisture is present.
  3. Remove any loose or peeling paint.
  4. High gloss and enamel paints should be sanded.
  5. Surfaces must be completely dry.

Dry Wall Partitioning

  1. Cover dry wall partitioning joints with suitable jointing tape.
  2. Prime the entire surface with a suitable oil based primer.

All surfaces must be free of dust, dirt and all other foreign matter.

 

Instructions

Mixing

  1. Pour 10 litres of clean water into a clean plastic container.
  2. Sprinkle 25 kg* Coprox Waterproof Dualcoat slowly into the clean water stirring constantly until smooth and free of lumps. Use immediately. To prevent settling, stir frequently throughout the application.

Surface Keying

To ensure adequate adhesion, key surfaces as follows:

Surface

Keying Agent

When to apply

Masonry Surfaces

Clean Water

While surface is still wet

Good Quality Paint

No Keying Agent

Directly onto dry paint

Dry Wall Partitioning

Oil Based Primer

When Primer is dry

First Coat

  1. Key the surface according to table above.
  2. Liberally apply the Coprox Waterproof Dualcoat to the keyed section using a suitable brush (the brush type will determine the texture of the application).  Ensure all depressions, fine cracks and pin holes are covered.
  3. Once the Coprox Waterproof Dualcoat 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.

Should a Second Coat be required:

  1. Apply the second coat 6 - 8 hours or more after curing the first coat.
  2. Wet the first coat with water and apply in the same manner as before.
  3. The second coat may appear lighter than the first coat.

When being used for decorative purposes, bathrooms, showers and kitchens should be sealed with Coprox Wall & Floor Clear Sealer to prevent staining.

Coverage - One Coat per 25 kg

Raw Brick

Raw Plaster/Dry Walling

Painted Surfaces

20 m2 (approx.)

30 m2 (approx.)

35 m2 (approx.)

   
 

Decorative Finish

Where Coprox Waterproof Dualcoat is used as a decorative finish, it is still applied in exactly the same manner as a waterproofing application. For aesthetic purposes however, additional attention must be given to the surface preparation. Where unpainted and painted surfaces adjoin each other, the unpainted surfaces should first be painted the same colour as the painted surfaces before application commences in order to minimize colour variations of the completed application. When used on dry wall partitioning, the joints should first be covered with jointing tape and then the entire surface primed with a suitable oil based primer.

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.

Where a Second Coat is desired, the same colour must be used for both the first and second coat. The second coat may appear lighter than the first coat.

When being used in bathrooms, showers and kitchens the application should be sealed with Coprox Wall & Floor Clear Sealer to prevent staining.

Changing the colour of an existing Coprox Waterproof Dualcoat application

It is a simple exercise to change the colour of an existing Coprox Waterproof Dualcoat application. Only Coprox Masonry Waterproofing and Coprox Cobond are needed to achieve this.

Surface Preparation

  1. Ensure your existing application has been allowed to properly cure for at least 24 hours and is dry before proceeding to change its colour.
  2. Remove dust, dirt and all foreign matter.

Mixing

  1. Pour 5 litres of clean water into a clean plastic container.
  2. Mix 50 ml of Cobond with the 5 litres of clean water and stir thoroughly.
  3. Sprinkle 5 kg of the desired colour Coprox Masonry Waterproofing slowly into the Cobond and water mixture stirring constantly until smooth and free of lumps. Use immediately. To prevent settling, stir frequently throughout the application.

Application

  1. Do not wet the existing application.
  2. Apply the Coprox Masonry Waterproofing and Coprox Cobond mixture using a suitable brush to the clean and dry existing application.
  3. Should a second coat be desired, apply in the same manner as before.

When being used in bathrooms, showers and kitchens the application should be sealed with Coprox Wall & Floor Clear Sealer to prevent staining

   
Trowel-on Skim Coat - Walls, Floors & Clay Tiles

Note: If applying over tiles that have wide or deep grouting, the application may have to be done twice in order to hide the grout marks. Should this be the case, allow the first application to dry for at least one week before repeating the application for a second time.

Mixing

  1. Pour 7 litres of clean water into a clean plastic container. To minimise crazing and cracking, substitute 1 litre of water with 1 litre of Coprox Cobond.
  2. Sprinkle 25 kg* Coprox Waterproof Dualcoat slowly into the clean water stirring constantly until smooth and free of lumps. Use immediately. To prevent settling, stir frequently throughout the application.

Application

  1. Key porous masonry surfaces with clean water. Key smooth or dense masonry surfaces and clay tiles with Coprox Cobond.
  2. While the surface is still wet or the Coprox Cobond is still tacky, spread the Coprox Waterproof Dualcoat evenly over the entire keyed surface with a wooden or steel float to a thickness of 3 mm to 5 mm. The entire application must be floated without interruption to avoid noticeable overlaps.
  3. Once the Coprox Waterproof Dualcoat has dried sufficiently, level the application with a wet wooden float.
  4. Then, to achieve a glass smooth finish, float the application using a wet steel float.
  5. On large areas, expansion joints can be utilised to minimise cracking.
  6. Once the Coprox Waterproof Dualcoat visibly begins to dry, cure the application by evenly wetting it with a fine mist spray. Repeat this procedure one or more times to minimise crazing and powdering. In hot climates or high temperatures, cure the application more frequently.
  7. Allow the application to dry for at least 48 hours before use and before applying Coprox Wall & Floor Clear Sealer. Drying times may be longer in cold or wet weather.

Coverage per 25 kg

5 mm thickness - 5 m2 (approx.)

Care & Protection

  • Do not drag or scrape heavy or sharp objects across the surface.
  • Protect bathroom, shower and kitchen walls and floors against scuff marks or stains with Coprox Wall & Floor Clear Sealer.
  • Allow the Coprox Waterproof Dualcoat to dry for at least 48 hours before the sealer is applied. If a polyurethane epoxy sealer is to be used, the Coprox Waterproof Dualcoat must first be sealed with Coprox Wall & Floor Clear Sealer to avoid discolouration of the application.

Cleaning Tools & Equipment

Use clean water. Product and waste water containing product should not be discharged directly into drains and waterways.

*Packaging

1 kg Cardboard Box; 25 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, hydrated lime, 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.

_________________________________________________________________________________

Coprox International (Pty) Ltd has no control over the purpose for which its products are used, stored, prepared and applied.  No warranty is therefore given as to its suitability, nor is any warranty, express or implied, given for any damage of whatsoever nature, consequential or otherwise, arising out of the use of its products.

 

View Videos