EXTREME DURABILITY & ADHESION ON ANY SUBSTRATE: For filling and repairs with no depth limit. It sets to a rock hard finish and can be overcoated in 24 hours. Overcoat with any standard water-based masonry paint or mineral paint. If using polyurethane or epoxy solvent-based paints, first prime with a water-based exterior paint.
Warning - Please carefully follow usage instructions and refer to the technical data sheet.
Shaping and repairing without formwork Filling and repairing (holes, gaps, cracks)
Time between coats
As soon as the filler is dry
New or renovated, painted or unpainted substrates: gypsum plaster, old painted surfaces, cement, concrete, breeze blocks, bricks, stones, glass, glazed tiles.
Any waterborne masonry or conventional coating any mineral, organic and siloxane binder paints. If using solvent based paint, a first primer coat of waterborne masonry paint is recommended.
Maximum recommended application thickness
No depth limitation
Ready to paint time
Filling knife Blade Trowel
Recommended temperature and humidity for application
Do not apply at a temperature below 5°C or above 35°C nor at a relative humidity over 80%.
Adhesion filler/substrate (EN 16-566): > 0.8 Mpa
Coverage g/m² (at 1mm thickness)
IAQ (Indoor Air Quality) classification
Colour when dry
Product guaranteed for 6 months from purchase, in original package and stored away from humidity.
We state a drying time of at least 24 hours on all our exterior products to be absolutely sure that they’re ready for the next stage of your process in unpredictable weather. This can of course be quicker in the right conditions.
Which filler should I use for levelling the surface of an exterior wall made of various materials and locally covered with paint?
First of all, make sure that the paint on the base substrate is not a plastic-based coating. This can’t be covered by any filler and needs to be stripped beforehand. Then, after scraping away non-cohesive areas and checking the moisture rate of your substrate, you can apply Rock Solid Repair Filler or Tough Multi-Filler to fill holes, cracks and various gaps. Once your localised filling is dry, you can apply our Exterior Skimcoat or Tough Mukti-Filler as a skim coat (up to 5mm) to achieve a really smooth and even wall. Then, once these filler coats are dry, you can apply your final coat.
Rock Solid Repair Filler vs. Masonry Repair Filler: Which should I use?
For bare masonry (damp or dry) apply Masonry Repair Filler. For all other dry substrates, including glass and glazed tiles, use Rock Solid Repair Filler.
Due to the strong properties of Rock Solid Repair Filler, it will need to be shaped and sanded before it sets. Masonry Repair Filler, on the other hand, can be sanded with ease.
If you’re looking to paint over the filler, consider that Masonry Repair Filler is cement-based and therefore requires pH levels to drop back before you are able to do so. This will take between 48 and 72 hours. Rock Solid Repair Filler can be painted over in 24 hours, regardless of the depth to which it has been applied.