Mapei Isolastic is a latex additive to be mixed with Kerabond Plus to improve the performance and deformability to satisfy class C2 S2 (improved cementitious adhesive and class S2 (highly deformable adhesive) according to AS ISO 13007 requirements. Adhesives obtained this way are suitable for interior and exterior bonding of all types of ceramic tiles (double-fired, single-fired, quarry tiles, klinker, terracotta, glass mosaics, porcelain tiles, etc.) and stone material on conventional substrates, on concrete, precast concrete panels as long as well cured (3 months), heating panels, fibrous cement, plaster board and wood or wood composition panels as long as they are firmly fixed. Installations can be carried out over gypsum-based or anhydrite surfaces only if specifically primed beforehand.
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| Product | Consumption (kg/m2) | |||
| powder | Mapei Isolastic | water | ||
| Mosaic and small tiles | Kerabond/Kerabond T/ Kerabond Plus + Isolastic | 2 - 3 | 0.7 - 1 | - |
| Kerabond / Kerabond T / Kerabond Plus / Adesilex P10 + Isolastic diluted 1: 1 with | 2 - 3 | 0.3 - 0.5 | 0.3 - 0.5 | |
| Medium-sized tiles | Kerabond / Kerabond T/ Kerabond Plus + Mapei Isolastic | 4 - 5 | 1.3 - 1.7 | - |
| Kerabond / Kerabond T / Kerabond Plus / Adesilex P10 + Isolastic diluted 1: 1 with water | 4 - 5 | 0.6 - 0.9 | 0.6 - 0.9 | |
| Large-sized tiles | Kerabond / Kerabond T / Kerabond Plus + Mapei Isolastic | > 6 | > 2 | - |
| Kerabond/KerabondT/Kerabond Plus/Adesilex P10 + Isolastic diluted 1 : 1 with water | > 6 | > 1 | > 1 |
Mixed with Mapei Kerabond Plus:
| Pot life | over 8 hours. |
| Open time | 30 minutes |
| Grouting | - walls: 4-8 hours - floors: 24-36 hours |
| Set to light foot traffic | 24-36 hours |
| Ready for use | approx. 14 days |
| Deformability according to EN 12002 | S2 - highly deformable |
| Application | Kerabond Plus: notched trowel n. 4 or 5 or 6 |
| Storage | 24 months. Protect from frost. |
| Consumption | 1-2 kg/m2 |
Isolastic is a type of latex mixed with Mapei Kerabond, Kerabond T, Kerabond Plus and Adesilex P10, undiluted or diluted 1 : 1 with water, in order to meet the requirements defined in EN 12004 for the following classifications:
| Product | Classification according to EN 12004 | Description |
|---|---|---|
| Kerabond + Isolastic | C2ES2 | High-performance, highly deformable cementitious adhesive with extended open time |
| Kerabond + Isolastic diluted 1:1 with water | C2ES1 | High-performance, deformable cementitious adhesive with extended open time |
| Kerabond T + Isolastic | C2ES2 | High-performance, highly deformable cementitious adhesive with extended open time |
| Kerabond T + Isolastic diluted 1:1 with water | C2ES1 | High-performance, deformable cementitious adhesive with extended open time |
| Kerabond Plus + Isolastic | C2ES2 | High-performance, highly deformable cementitious adhesive with extended open time |
| Kerabond Plus + Isolastic diluted 1:1 with water | C2ES1 | High-performance, deformable cementitious adhesive with extended open time |
| Adesilex P10 + Isolastic diluted 1:1 with water | C2ES1 | High-performance, deformable cementitious adhesive with extended open time |
For interior and exterior bonding of:
Bonding on internal and external floors or vertical surfaces of glass or ceramic mosaic on paper or mesh backings, even heavy ones.
Mapei Isolastic is a very fluid, pinkish-white liquid composed of a water dispersion of an extremely elastic polymer, which, when mixed with cementitious adhesives, improves adhesion to all substrates, deformability and impermeability, once hydration has taken place.
Mapei Kerabond. Mapei Kerabond T. Kerabond Plus or Adesilex P10 mixed with Isolastic must never be used for:
In dry, hot climates, the open time of the adhesive made by mixing Mapei Isolastic into Kerabond, Kerabond T, Kerabond Plus or Adesilex P10 is shorter. A skin may form on the surface, which must then be removed and fresh adhesive applied.
All substrates receiving Kerabond, Kerabond T, Kerabond Plus or Adesilex P10 + Isolastic must be flat. mechanically strong, free from loose parts, grease, oil, paint, wax, etc. Precast concrete elements or in situ concrete must be cured for at least 3 months in favourable weather conditions. Cementitious substrates must not be subject to shrinkage once the tiles have been installed, therefore in warm weather renders should be cured at least one week per centimetre of thickness. Cementitious screeds must have an overall cure of at least 28 days unless they have been made with the special MAPEl binders for screeds such as Mapecem, Mapecem Pronto, Mapei Topcem or Topcem Pronto. Surfaces that are too hot due to exposure to direct sunlight should be cooled by dampening them with water.
Gypsum substrates and anhydrite screeds must be perfectly dry (maximum residual humidity 0.5%, 0.3% in case of heated screeds) sufficiently hard and free from dust. They must always be treated with Mapei Primer G or Mapei Eco Prim T. Areas subject to extreme damp must be primed with Primer S. On existing floors, remove any traces of grease, wax, dirt, etc. by using specific products or by abrading the surface with a power tool. As a general rule, refer to the relative MAPEl technical documentation about substrate preparation before repairing cracks in substrates, consolidating rapid-drying screeds and leveling off installation surfaces.
The mixing ratio is determinated by the degree of deformability required of the adhesive: use Isolastic as a complete substitute for water when a highly deformable adhesive (class $2 according to EN 12004) is required, e.g for substrates subject to strong size variations such as concrete structures with less than 6 months curing, for large-sized tiles or slabs or for those subject to considerable sudden temperature changes. Isolastic diluted 1: 1 with water may be used when a deformable adhesive is required (class S1 according to EN 12004), for example on moderately unstable substrates, cured concrete substrates, etc.
| Product | Mixing ratio | |
|---|---|---|
| Parts in weight | Kg | |
| Kerabond + Isolastic | Kerabond : Isolastic = 100 : 33 | 8.5 kg of Isolastic per 25 kg bag of Kerabond |
| Kerabond + Isolastic diluted 1: 1 with water Kerabond T + Isolastic | Kerabond : Isolastic : water = 100 : 16 : 16 | 4 kg of Mapei Isolastic + 4 kg of water per 25 kg bag of Kerabond |
| Kerabond T + Isolastic | Kerabond T: Isolastic = 100 : 33 | 8.5 kg of Isolastic per 25 kg bag of Kerabond T |
| Kerabond T + Mapei Isolastic diluted 1:1 with water | Kerabond T: Isolastic: water = 100 : 16: 16 | 14 kg of Isolastic + 4 kg of water per 25 kg bag of Kerabond T |
| Kerabond Plus + Isolastic | Kerabond Plus : Isolastic = 100 • zz | 8.5 kg of Isolastic per 25 kg bag of Kerabond Plus |
| Kerabond Plus + Isolastic diluted 1 : 1 with water | Kerabond Plus : Isolastic : water = 100 : 16 : 16 | 4 kg of Isolastic + 4 kg of water per 25 kg bag of Kerabond Plus |
| Adesilex P10 + Isolastic diluted 1: 1 with water | Adesilex P10 : Isolastic : water = 100 : 18 : 18 | 4.5 kg of Isolastic + 4.5 kg of water per 25 kg bag of Adesilex P10 |
When Mapei Isolastic is used in dilution with water, thoroughly blend part of Isolastic with a small amount of clean water first. Pour the powder into the liquid and continuously stir the mix with a slow-speed mechanical mixer until it becomes a smooth paste free of lumps. Let the mix stand for a few minutes and, after further stirring, proceed with the application.
Apply the adhesive on the substrate using a notched trowel. Use a trowel with a notch size which guarantees adequate buttering. To get good adhesion, spread an initial thin layer of the adhesive mix on the substrate using the smooth side of the trowel, then immediately apply another layer of adhesive to the thickness required using the notched part of the trowel. Use a trowel suitable for the type and format of the tiles to guarantee that the backs of the tiles are adequately buttered. Use the double-buttering technique and spread the adhesive also on the back of the tiles to ensure complete wetting and the absence of gaps, in the following cases: external installations, when installing large-sized tiles, thin tiles, tiles with reliefs on their back, flooring to be polished after installation or subject to high static or dynamic loads, heated
floors or storage tanks and swimming pools.
Follow the recommendations shown in the technical data sheet of the adhesive with which Mapei Isolastic is mixed. However, greater attention should be paid to the open time which, in the equivalent relative temperature and humidity conditions, will be slightly shorter than the open time of the basic product.
Wall joints can be grouted after 4-8 hours and floor joints after 24-36 hours with the special MAPEl cementitious or epoxy grouts, available in different colors. Expansion joints must be sealed with the special MAPEI sealants
Floors are set to light foot traffic after 24-36 hours
Surfaces are ready for use after approximately 14 days. Basins and swimming pools can be filled after 4 weeks.
Tools can be cleaned using plenty of water before the adhesive begins to set. After setting, cleaning becomes very difficult, but can be helped with a solvent such as white spirit.
| Consistency: | fluid liquid |
| Colour: | pinkish white |
| Density (g/cm3) | 1.03 |
| pH: | 5-6 |
| Dry solids content (%): | 35 |
| Brookfield viscositv (mPa.s): | 40 |
| EMICODE: | EC1 Plus - very low emission |
| Kerabond or Kerabond Plus or Kerabond T + Mapei Isolastic | Adesilex P10 + Isolastic diluted 1:1 | |
|---|---|---|
| Mixing ratio: | 100 - 33 | 100: 36 (18 parts of water and 18 parts of Mapei Isolastic) |
| Consistencv of mix: | verv pasty | verv creamy |
| Colour: | grey/white | white |
| Density of the mix (ka/m3) | 1500 | 1450 |
| pH of mix: | over 12 | |
| Pot life: | 8 hours | 8 hours |
| Application temperature range: | from +5°C to +40°C | from +5°C to +40°C |
| Open time: | 20-30 minutes | 30 minutes |
| Adjustability time: | approx. 45 minutes | 45 minutes |
| Grouting wall joints: | after 4-8 hours | after 4-8 hours |
| Grouting floor joints: | after 24 hours | after 24 hours |
| Set to light foot traffic: | 24 hours | 24 hours |
| Ready for use: | 14 days | 14 days |
| Kerabond or Kerabond Plus or Kerabond T + Isolastic | Adesilex P10 + Isolastic diluted 1 :1 | |
|---|---|---|
| Tensile adhesion strength (N/mm?): - initial (after 28 days): - after heating: - after water immersion: - after freeze- thaw cycles: | 2.4 2.5 1.6 1.8 | 2.1 3.0 1.3 1.4 |
| Resistance to alkalis: | excellent | excellent |
| Resistance to oils: | excellent (poor to vegetable oils) | excellent (poor to vegetable oils) |
| Resistance to solvents: | excellent | excellent |
| Temperature when in use: | from -30°C to +90°C | from -30°C to +90°C |
| Deformability according to EN 12004: | >5 mm S2 highly deformable | > 2.5 S1 deformable |
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