VANDEX UNIMORTAR 1 | Waterproofing and repair mortar

SCOPE OF APPLICATION

- Concrete, masonry and natural stone

- Filling, levelling and localised repairs

- Joints between masonry and flooring

- Foundations, concrete slabs, retaining walls

- Drinking water tanks and channels

- Surfaces subject to high mechanical wear and abrasion

APPLICATION NOTES

Any leaks must first be sealed with VANDEX PLUG. The substrate must be dampened and, during application, remain slightly damp but not wet, with no standing water.

Mixing: 25 kg of powder to 3.0–4.0 litres of water, mixed for at least 3 minutes using a mechanical mixer. To maintain workability, do not add water — simply remix the mixture.

Layers are applied ‘wet on wet’: the next layer is applied before the previous one has dried completely; the previous layer is roughened whilst still plastic to provide adhesion. A trowel is used to apply a rough coat first, working from the bottom up, to fill all voids and prevent air from becoming trapped. When spraying, the nozzle size is ~10 mm and is held at a 90° angle.

Do not apply at temperatures below +5 °C. Afterwards: keep moist for 5 days under polyethylene

or hessian; protect from rain for 24 hours. Final curing takes 28 days — after

which painting is permitted, using an alkali-resistant material. For rendering over the top,

apply a sprayed cement mortar whilst the surface is still damp.