IZONIL Waterproof Plaster:- by Octagreen

IZONIL Waterproof Plaster:- by Octagreen

by Editor

Plaster is a building material used for the protective or decorative coating of walls and ceilings and for the casting and casting of decorative elements. In English, plaster refers to the material commonly used for the interiors of buildings, while render usually refers to outdoor applications.

Products Specification

100% waterproof plastering mortar (resistant against water pressure 1 BAR / 0.1 MPa with water penetration less than 1 mm) and dehumidifying plastering mortar (with a high volume of micropores which allows the permanent dehumidifying process of the wet substrate). Meets the requirements of EN 998-1 as renovation plaster.

Provides a long-term solution to a problem of water penetration on the surface of the wall (when applied on the negative side) and long-term solution to a problem of water penetration to the wall (when applied on the positive side) and simultaneously provides long-term solution of ventilation and drying of wet walls (when applied both on the negative and positive side). It does not contain any harmful or toxic ingredients (suitable to be used in direct contact with drinking water).

Industrially dry-mixed 100% waterproof breathable plastering mortar with dehumidifying ability based on Portland cement, silica sand, unique natural admixture (Izocomponent) and reinforced with fibres for external/internal and positive/negative application as a replacement for general purpose plastering mortars, renovation plastering mortars and diffusion-closed waterproof membranes and coatings.

Applicable on a vertical surface (brick walls, light concrete block walls, rough concrete walls) and horizontal surface (concrete
floors and concrete roofs) both for the renovation of existing/historical buildings and new buildings:

  • Basements, cellars, shafts and underground parts of buildings
  • Wall plinths or whole wall areas internally and externally
  • Roof decks, balconies, terraces
  • Bathrooms, showers, toilets to prevent water penetration between floors
  • Concrete water tanks, swimming pools, fish ponds or other concrete water-storage facilities


The plaster is designed to be applied on vertical substrates (brick wall, light concrete block wall, rough concrete wall) and horizontal substrates (concrete floors and concrete roofs). The substrate must be solid, cement grout-free, free of dirt, oil, grease, dust, paint or other dirt and loose parts. It must not be greasy, acid, water-repellent or alcoholic base.

The substrate must be thoroughly moistened immediately before applying the fresh plaster mixture and subsequently, it is recommended to apply cement adhesive bridge (Portland cement mixed with water) on the substrate. The thickness of the cement bridge should not exceed a few millimetres. The plaster is applied prior to the hardening of the cement bridge.


It is advisable to use a gravity mixer or hand-held electric mixer to mix the plaster. Water is always added first, 4.0 – 4.7 litres of water per 25 kg of dry plaster. Nothing else is added into mixed composition. Gravity mixer: Add the prescribed amount of water into the mixer first, followed by powder mixture and mix for at least 10 minutes in constant slowly mixing, into a homogeneous smooth mass. Hand-held electric mixer: Add the prescribed amount of water into a suitable mixing container, followed by a powder mixture. Mix for at least 5 minutes with constant slowly mixing, into a homogeneous smooth mass. Then leave the plaster rest for 5 minutes and then mix again for 1 minute. Process the mixed material within 3 hours.


Plaster is applied manually (using standard tools for plastering) or by a plastering machine pump (it is important to set up and test the fresh mixture for a specific type of machine pump before application). Although plaster contains PP fibres for the elimination of surface hairline cracks, it is recommended to use fibreglass mesh to overlap sensitive areas (connection of 2 different materials, e.g. bricks and concrete, corners of walls, corners of windows and doors, connections of walls and floors etc.). It is also possible to use fibreglass mesh for the whole applied area.

Recommended specification of fibreglass mesh is 5 mm x 5 mm (size) and 145 g / m​2​ (weight). Fibreglass mesh is applied close to the final surface. First, apply approx. 70% of the total thickness of plaster (e.g. 7 mm at 10 mm total thickness), then gently press fibreglass mesh with a trowel into a fresh layer of plaster and immediately apply the rest 30% of the total thickness of plaster (e.g. 3 mm at 10 mm total thickness). Plaster is applied in a maximum of 3 layers with a total thickness maximum of 30 mm. Total thickness is determined by the degree of moisture load in the substrate and by the requirement of layer thickness to align the surface of the wall.

One layer is applied in a total thickness of 10-15 mm. Before application of the next layer, it is recommended to slightly roughen the surface of the previous layer. Each layer is applied at least 24 hours after the previous layer was applied. In the case of application 2-3 layers, it is enough to use fibreglass mesh in the last layer in the manner described above. The surface of plaster is finished in the same way as ordinary cement-based plasters by foam trowel.

We recommend applying plaster at temperatures from +5 to + 25 C. Do not apply if freezing weather is expected. Do not apply the plaster in direct sunlight and/or strong wind or rain. Protect from rain for at least 24 hours from the application (at 20°C). If the plaster is applied inside, try to ensure proper room ventilation to achieve optimum wall drying.


Clearwater is used for the disposal of plaster from the tools and equipment. Hardened material can be disposed of only in a mechanical way. CARE AFTER APPLICATION It is necessary to prevent the plaster from too fast drying since the optimal moistness enables permanent hydration of


It is necessary to prevent the plaster from too fast drying since the optimal moistness enables permanent hydration of cement materials and minimization of cracking. Protect freshly applied plaster prior to rapid drying using appropriate protective methods for at least 48 hours, especially in dry and windy weather, or when exposed to direct sunlight.


It is recommended to let the plaster dry for at least 3 weeks before final coating. The surface of plaster can be coated with an interior / exterior coat of paint. It is recommended to use highly breathable – diffusion-open decorative coatings/paints (e.g. silicate paints, cement paints, lime paints). Check the suitability of your coating/paint with the distributor/retailer. In case tiles are used, it is recommended to roughen the surface of the plaster and use the usual tile adhesive to stick tile to the surface. Grout for tile gaps should be breathable (not silicone-based) to preserve the breathability of the surface.


  • No additives other than pure water are added to the product
  • The product is not applied at direct sunlight and/or strong wind or rain
  • The product is only applied on a solid, pre-prepared substrate
  • The freshly applied plaster must be protected from rain for at least 24 hours (at 20 ° C)
  • The newly applied plaster must be protected from direct sunlight for at least 48 hours
  • If the plaster is applied inside, it is necessary to ensure proper ventilation of the room for optimum drying of the wall
  • Mixed product can only be processed at air and substrate temperature above + 5 ° C
  • With the expected freeze, it is not recommended to use the product
  • Potable water or water according to EN 1008: 2003 is used for mixing of the product
  • Unused plaster remnants are mixed with water and allowed to cure – can be disposed of as construction waste
  • Dispose of contaminated packagings as hazardous waste

Technical Specification

Appearance / colorPowder / grey
Chemical compositionSilica sand, Portland cement, natural admixture Izocomponent, PP fibres
Size of silica sand particles0 – 0.6 mm (SOFT version), 0 – 2 mm (ROUGH version)
Packaging25 kg paper bag
Shelf lifeMinimum 18 months
Water/powder ratio4.0 – 4.7 litres of clean water / 25 kg of dry plaster
Pot life/workabilityMinimum 3 hours (at temperature 20 ​°​C)
Thickness of layerOne layer from 10 mm to 15 mm, maximum 3 layers with total thickness 30 mm
Coverage / consumptionAt thickness 10 mm 1 m2​ ​ = 12.5 kg of dry plaster 25kgofdryplaster =2m​2 At thickness 20 mm 1 m2​ ​ = 25 kg dry plaster 25 kg dry plaster = 1 m​2


  • World-unique plastering mortar simultaneously 100% waterproof, breathable and dehumidifying ⨀ Resistant against penetration of rain water and running water
  • Resistant against penetration of water under pressure up to 1 BAR (tested according EN 12390-8) ⨀ Water penetration less than 1 mm under 1 BAR water pressure during 72 hours test
  • Meets requirements for general purpose plastering mortar (EN 998-1)
  • At the same time meets requirements for renovation plastering mortar (EN 998-1)
  • Highly breathable (water vapor diffusion coefficient
  • Excellent adhesion to the substrate with minimum waste during application
  • Resistant against salt crystallization and sulphur-resistant
  • Applicable on damp surface
  • Applicable manually or by plastering machine
  • Applicable above-ground and underground, externally and internally, positive and negative side ⨀ Non-toxic, suitable to be used in direct contact with drinking water.


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