ESTonetex Forte
Applications
• Decorative thin layer on expanded (EPS) and extruded (XPS) polystyrene, indoors and outdoors
• Adhesion and protection of sculptures, rocks and lightweight theming elements made of EPS/XPS
• Decorative finishes also on concrete or plasterboard
• Thin-layer decorative finishes such as microcement, stucco, travertine and similar
• Primer for TXT, Park, Sulfo and Extreme mortars
Technical specifications
| Packaging | 25 kg paper bag. Pallet of 48 bags (1,200 kg) |
| Reference | 1001 |
| Colour | White |
| Application thickness | 2 to 15 mm |
| Mixing water | 6 to 6.5 L per 25 kg bag (5 to 6 L for spraying) |
| Fresh mortar density | 1.55 ± 0.1 kg/l (at 20 °C) |
| Consumption | Approx. 4.5 kg/m² as adhesion mortar and 5.5 kg/m² as reinforcement mortar |
| Application temperature | Between 5 °C and 35 °C |
| Pot life | Approx. 1 hour at 23 °C |
| Compressive strength | ≥ 9 N/mm² at 28 days (EN 1015-11) |
| Flexural strength | ≥ 3.5 N/mm² |
| Adhesion | On polystyrene board: cohesive failure in the substrate (≥ 3.5 N/mm²). On concrete: ≥ 0.8 N/mm² |
| Water vapour permeability | μ = 5/20 (EN 1015-19) |
| Thermal conductivity | 0.47 W/mK |
| Classification | GP CSIV W2 (EN 998-1) |
| Water properties | Waterproof to rainwater and permeable to water vapour |
| Shelf life | 24 months in the original closed packaging, under cover and in a dry place |
Data verified in the official technical data sheet. Full technical documentation and certificates are available on request through the contact form.
Supports
Insulation boards (anchoring), plasterboard and fibre-cement boards, mortar renders, concrete or ceramic blocks and concrete. Substrates must be sound, clean, free of paint residues or poorly bonded parts, with suitable flatness and no moisture problems. In hot or windy weather, or on very absorbent substrates, dampen the substrate and wait until the water film disappears. Do not apply on plaster, paint, plastic or metal.
How is ESTonetex Forte mixed?
Mix with 6 to 6.5 litres of clean water per 25 kg bag, by hand or with an electric mixer, until a homogeneous, creamy, lump-free mix is obtained. Let it rest for 5 minutes before applying. It is mixed with water only; it can optionally be combined with EST-EPS Elastic resin (1:3 ratio) for a specific decorative finish on EPS/XPS.
How is it applied?
Adhesion on EPS/XPS: apply a thickness of 3 to 5 mm, embed Fibreglass mesh, cover it with the mortar itself, scratch the surface and let it dry for at least 24 hours before coating with ESTonetex System mortars. Decorative finish on EPS/XPS: clean the polystyrene, load the mortar, cream-like in consistency, into the spray gun and spray at least 3 coats, leaving 2 hours between coats. Total thickness of 2 to 15 mm. You can watch the application tutorial.
Observations and precautions
Do not apply with risk of frost, rain, strong wind or direct sun, or in areas with standing water; protect if heavy rain is expected within 24 hours after application. Do not apply below 5 °C or above 35 °C. Contains cement: wear gloves, goggles and a mask. Professional product: always consult the safety data sheet.
Pigmentation
Once dry, it can be pigmented with EST-26 Multilite, EST-Monocrom or EST-Multipol, and sealed with the EST-3 Plus water repellent.
Complementary materials
• EST-EPS Elastic: optional resin for a specific decorative finish on EPS/XPS (1:3 ratio)
• Fibreglass mesh: recommended for adhesion on EPS/XPS
• EST-26 Multilite / EST-Monocrom / EST-Multipol: pigmentation of the finish once dry
• EST-3 Plus: water repellent to seal the finish
Frequently asked questions
Does ESTonetex Forte mortar need resin?
No, it is mixed with water only. EST-EPS Elastic resin is optional, only for a specific decorative finish on EPS/XPS.
What is the difference between ESTonetex Forte and Fibrax?
Both are applied on EPS/XPS, but neither requires the other. ESTonetex Fibrax is a super-fibre primer mortar that avoids the need for fibreglass mesh. Forte is a thin-layer decorative mortar (2 to 15 mm) with its own mesh-embedded adhesion method, and it also works as a primer for TXT, Park, Sulfo and Extreme.
Is fibreglass mesh needed with ESTonetex Forte?
Only when Forte is used as a primer: a 3 to 5 mm layer is applied, the mesh is embedded and covered with the mortar itself. The sprayed decorative finish does not need mesh.
Can ESTonetex Forte be used as microcement or stucco?
Yes, it is used for thin-layer decorative work such as stucco, travertine, microcement and rock texture, as well as EPS figures.
How much ESTonetex Forte mortar is needed per m²?
Approximately 4.5 kg/m² as adhesion mortar and 5.5 kg/m² as reinforcement mortar, according to the technical data sheet. A 25 kg bag therefore covers about 5.5 m² as adhesion and about 4.5 m² as reinforcement.
How long does ESTonetex Forte last once mixed?
Approximately 1 hour at 23 °C. Mix only the amount you are going to apply.
What temperature can ESTonetex Forte be applied at?
Between 5 °C and 35 °C. Do not apply with risk of frost, rain or strong wind.
Is ESTonetex Forte mortar water resistant?
It is waterproof to rainwater and permeable to water vapour, which avoids internal condensation.
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