R-Stone Fondo

Decorative textured coating for interiors and exteriors

R-stone Fondo is a decorative coating made of special pigments, resins and selected inerts for the decoration of vertical interior and exterior surfaces.

R-stone Fondo represents the expression of Novacolor commitment to the environmental sustainability. To reduce the “carbon footprint”, R-stone Fondo is formulated with a special binder, made from sustainable biomass, that replaces the fossil raw materials.

This is possible thanks to a technical-productive system called “mass balance approach” certified REDcert².

Application:

Plaster Substrates

The substrate must be perfectly dry, dust-free, with no humidity and salt stains.
Resurface or consolidate the surface with specific products if necessary.
In case of mould, treat the surface with suitable specific products. Brush or remove any efflorescence and old peeling paint.
Higher layers of old lime-based paint and tempera paint must be removed.
Brush out dust, smog or other deposits before the application.
Cracks must be properly enlarged and filled with fillers or similar products. Level substrates irregularities. Holes and cracks can be treated by proper levelling products according to the type of substrate.
Make sure that the substrate is perfectly dry and apply, with a brush a layer of diluted Novaprimer (acrylic water-based sealer) or alternatively apply with a brush a layer of diluted Decofix (micronized wall sealer).
For gently textured finishes apply one layer of R-stone Fondo with a stainless steel trowel.
After 8 hours at least apply with stainless steel trowel a second layer of R-stone Fondo, working the surface according to the desired effect.

Concrete Surfaces

The surface must be clean and dry, cohesive and compact and have no dust and mineral salt spots.
If necessary, restore or consolidate using specific products. Treat the surface with appropriate products in the presence of mould.
Remove any salt bloom and any flaking old paint by brushing or washing. Completely delete any raised layers of paint. Remove the dust deposits, smog and other by brushing.
Remove the cement structural parts that are poorly adherent.
The reinforcement metal round bars that are visible on the surface must be brushed thoroughly and treated with passivating grout.
Restore the missing parts with suitable anti-contraction, thixotropic, fibre-reinforced mortar.
Perform final smoothing with anti-contraction anti-carbonation levelling agent.
Make sure that the substrate is thoroughly dry and apply a layer of diluted Decofix (micronized wall primer) and wait for the primer to dry.
For gently textured finishes apply one smooth layer of R-stone Fondo with a stainless steel trowel.
After 4 hours at least apply with stainless steel trowel a second layer of R-stone Fondo, working the surface according to the desired effect.

New Surfaces

Before covering an ETICS surface, it is good practice to check:
- The adhesion of the insulating panels to the substrate.
- The presence of any inconsistent parts which are coming off or damaged; these must be removed.
- That the surface is smooth and not crumbling.
- There are no cracks on the surface between the various insulating panels.
- There are no algae or mould present, then proceed with sanitization using specific products, if necessary.
- The surface is dry and free from condensate.
Apply a layer of diluted Decofix (micronized wall primer).
Proceed with reinforced levelling using cement-based adhesive suitable for external insulation finishing system:
A smoothing agent is recommended with:
- maximum dimension of the aggregates: 0.75 mm
- adhesion to concrete/brickwork: > 0.25 MPa
Embed an alkali-resistant plaster mesh, with weight of approx. 150 gr/m2 between the two levelled layers and wait for curing; see the manufacturer’s technical data sheet.
For a slightly textured finish, apply a first layer of R-stone Fondo and smooth down.
After 4 hours, apply a second layer of R-stone Fondo, working the surface depending on the aesthetic effect desired.

May also be applied over:

R-stone Fondo can be used for exterior surfaces only if covered with at least two layers of R-stone or Animamundi per Esterni.

New and old base hydraulic binder-based plaster.
Concrete surfaces.
Plasterboard surfaces.
Old paints and organic or mineral coatings, dry, compact, absorbent and cohesive.
Various absorbent mineral conglomerates.
ETICS surfaces (external thermal insulating composite systems)

Approximate coverage yields 1 Kg/m² in two layers, depending on the kind of substrate and its absorption rate. It is advisable to determine the real yield with a preliminary test on the specific substrate