ESTonetex Extreme SR-MR

Applications

•  Surfaces that will be submerged in fresh, salt or sea water: aquariums, submerged rocks, ponds, waterfalls, fountains, pools, spas and saunas

•  Professional theming in zoos, aquariums and harsh climates

•  Decoration of theme parks with heavy traffic and wear, and surfaces subject to high mechanical wear

•  Creation and restoration of horizontal and vertical surfaces, in artificial rock, stone, wood or tree trunks by moulding and spraying

•  Indoor and outdoor locations where climatic conditions make it hard for standard CS IV mortars to cure and reach optimal hardness

Technical specifications

Data verified in the official technical data sheet. Full technical documentation and certificates are available on request through the contact form.

Supports

Clean surfaces, free of dust, formwork release agents, paint or any substance that may affect adhesion, with a homogeneous, rough substrate. EST-26 Multilite is recommended as a bonding primer between the base and the mortar; let it dry for 24 hours before applying. It can be applied directly on meshes (expanded metal, plastic mesh or EST-Mesh), brick or hollow clay blocks; on smooth concrete, treat the substrate beforehand.

How is ESTonetex Extreme SR-MR mixed?

Prepare the solution of EST-26 Multilite and water (1 litre of additive per 5 litres of water) and mix each 25 kg bag with it until a homogeneous, lump-free paste is obtained: by hand, 4.4 to 4.6 litres for thicknesses of 1 to 1.5 cm and 4.2 to 4.5 litres above 1.5 cm; with a spraying machine, 4.8 to 5 litres. It can also be mixed with water only. Adjust the solution until the right viscosity is reached, especially for spraying, because temperature and wind alter it. Once homogenised, apply immediately. Do not mix with other products, except EST-26 Multilite.

How is it applied?

Apply the mortar enriched with EST-26 Multilite on the dry primer. By hand, first spread a very thin coat, pressing to release the trapped air, and then build up to the desired thickness (1 to 15 cm in a single coat, up to a recommended total of 15 to 20 cm in several coats); with a spraying machine, apply up to the desired thickness using the right technique for high thicknesses. Once levelled, wait 1 to 2 hours (sometimes 4 to 6) before theming, flattening, moulding, engraving and scraping. Then let it dry for 24 to 48 hours, during which the final effects and finishes can be made. Clean tools, machinery and hoses with water right after use, before the mortar sets. As final protection, apply the EST-3 Plus water repellent diluted 1:6 with water. You can watch the application tutorial.

Observations and precautions

Do not apply below 5 °C or with risk of rain or frost. Above 30 °C, dampen the base thoroughly, avoid prolonged exposure to the sun and monitor drying times. In demanding environments, control temperature and humidity through ventilation to avoid condensation. Contains cement: wear gloves, goggles and a mask. Professional product: always consult the safety data sheet.

Pigmentation

It can be pigmented in the mix with powder oxide pigments. Once dry, it accepts silicate glazes: non-covering (2 to 3 coats of EST-26 Multilite pigmented with Mixol oxides, in concentrated state, 200 to 350 ml/m² depending on the absorption of the substrate) or semi-covering (2 coats of EST-Monocrom with Mixol pigments).

Complementary materials

•  EST-26 Multilite: mineral silicate additive and primer (1 litre per 5 litres of water)

•  EST-Mesh 80 g/m² (10 x 10 mm): reinforcement mesh recommended at critical points or large thicknesses

•  Mixol dyes / EST-Monocrom: pigmentation and silicate glazes

•  EST-3 Plus: final protective water repellent (1 part to 6 parts of water)

Frequently asked questions

What is ESTonetex Extreme SR-MR mortar used for?
For surfaces that will be submerged in fresh, salt or sea water, and for professional theming in aquariums, zoos and theme parks with heavy wear, both in demanding indoor environments and outdoors and in harsh climates.

What is the difference between ESTonetex Extreme SR-MR and ESTonetex Extreme?
Both are suitable for aquariums, zoos and immersion areas. Extreme SR-MR is the sulphate-resistant version and is more resistant to sea water; it can be mixed with water only, although enriching it with EST-26 Multilite is recommended, whereas ESTonetex Extreme is always mixed with it. It also uses a lower-CO2 binder, is grey (Extreme is sandstone-coloured) and is applied at 1 to 15 cm in a single coat, versus the 2 to 6 cm of Extreme.

Is it mandatory to mix ESTonetex Extreme SR-MR with EST-26 Multilite?
No: the technical data sheet states that it can be applied mixed with water only. Enriching it with EST-26 Multilite (1 litre per 5 litres of water) is recommended, as it also allows 1 to 15 cm to be applied in a single coat. On average 800 to 1,000 ml of additive are needed per 25 kg bag. EST-26 Multilite is also recommended as the primer.

How much ESTonetex Extreme SR-MR mortar is needed per m²?
Between 18 and 20 kg/m² per centimetre of thickness, depending on the application viscosity. A 25 kg bag therefore covers approximately 1.25 to 1.4 m² at 1 cm thickness, and 0.6 to 0.7 m² at 2 cm.

How much water does each bag of ESTonetex Extreme SR-MR need?
With the EST-26 Multilite and water solution: by hand, 4.4 to 4.6 litres per 25 kg bag for thicknesses of 1 to 1.5 cm and 4.2 to 4.5 litres above 1.5 cm; with a spraying machine, 4.8 to 5 litres. Adjust the amount until the right viscosity is reached.

How long until ESTonetex Extreme SR-MR can be worked and how long does it take to dry?
Once levelled, wait 1 to 2 hours, sometimes 4 to 6, before theming, flattening, moulding, engraving and scraping it, depending on temperature and humidity. It is then left to dry for 24 to 48 hours, during which the final effects and finishes can be made. The mix must be applied immediately once homogenised.

What temperature can ESTonetex Extreme SR-MR be applied at?
Between 5 °C and 30 °C, with a maximum relative humidity of 80%. Above 30 °C, dampen the base thoroughly, avoid prolonged sun exposure and monitor drying times. Do not apply below 5 °C or with risk of rain or frost.

What mechanical strength does ESTonetex Extreme SR-MR have?
It reaches compressive strengths equal to or greater than 20 N/mm² with correct curing, three times the 6 N/mm² required by EN 998-1 for a CS IV mortar.

Can ESTonetex Extreme SR-MR be pigmented?
Yes. It can be pigmented in the mix with powder oxide pigments, or once dry with silicate glazes: EST-26 Multilite pigmented with Mixol oxides (2 to 3 coats) or EST-Monocrom (2 coats). EST-3 Plus is recommended as final protection.