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Blue brush-applied waterproofing. The colour shows where you have already coated A super-elastic UV-stable film for roofs and foundations
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AQUA BLOCK is a ready-to-use acrylic waterproofing mastic for brush-applied membranes.
The blue is quality control, not decoration. A brush-applied membrane only works as a continuous film, and one missed centimetre in a corner undoes the job. White mastic is hard to read on grey screed, especially on the second coat; a coloured film shows every miss before the tile goes down.
It bridges cracks and substrate movement: essential on balconies, terraces and roofs, where concrete works all year and any hairline crack in a rigid coating becomes a path for water.
Weather- and UV-resistant, so it can stay exposed on a roof or foundation instead of turning brittle in its first summer.
Roofs: felt, cement-sand, reinforced concrete; foundations and walls against soil; cellars; bathrooms, kitchens and showers; balconies and terraces; tanks and pools other than for drinking water.
Acrylic, solvent-free. Apply at +5 to +35 °C, service -40 to +80 °C. It skins quickly; full cure takes 24–72 hours depending on thickness, temperature and humidity. 3 and 7 kg, 18-month shelf life, water clean-up.
The substrate must be dry. It resists water pressing onto it, not hydrostatic pressure from the ground side, and is not for drinking-water tanks.
0.7–1.3 kg/m² over two solid 1 mm coats. Budget 1 kg/m².
Two or three coats are recommended. On exposed roofs and foundations a third coat is worth it: about 1.5 kg/m², for a markedly thicker film.
Consumption is higher than WATERBLOCK at 0.6–1.0 kg/m²: the price of the denser coloured film.
Preparation
Application
Using the colour
Then
| Material / Base | Compatible |
|---|---|
| Concrete, brick, gypsum, plasterboard | |
| Stone, granite, marble | |
| Wood, chipboard, fiberboard, MDF, plywood, OSB | |
| Tile, ceramic, porcelain | |
| Primed metal, galvanized coating | |
| Plastic, PVC | |
| Polystyrene foam |
Versus WATERBLOCK?
Colour and coverage: blue shows misses but uses 0.7–1.3 against 0.6–1.0 kg/m². WATERBLOCK is white, tintable and rated to +100 °C against +80 °C here.
Can it stay exposed on a roof?
Yes. It is UV- and weather-resistant.
How many coats?
Two minimum, three on exposed roofs and foundations.
Pools?
Yes, except drinking-water tanks.
Onto a damp screed?
No. It needs a dry substrate or the film will blister.
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