Brand: RA&Sons

RASOKOLL is a dual purpose adhesive and render specifically designed for thermal insulation boards. It’s premixed formula of cement, sand and high grade additives gives it the flexibility needed to act as both a strong adhesive and also a durable coloured render. It is available in either white or grey and conforms to the European standard EN 1504-3.

Surface Preparation

All surfaces should be completely sound and clean, dry and dust free. Any surface contaminants like grease, oil and efflorescence must be removed in order to promote adhesion.



RASOKOLL should be mixed with a mechanical paddle mixer to achieve a smooth and lump free consistency. Mix in a clean bucket using approximately 6-7 litres of clean water per 25Kg bag. Allow the mixture to stand for 5 minutes before application. As an adhesive apply RASOKOLL with a notched trowel at a rate of 4-5 Kg/m² and anchor boards with insulation fixings where necessary. As a render apply a base coat of RASOKOLL with a metal or stainless steel trowel to a depth of 3-4 mm then a fibre reinforcing mesh over the render, leave for 12 hours. Apply a second coat of RASOKOLL to a depth of 3-4 mm as a finishing coat.



Do not apply RASOKOLL:

  • When temperatures are below +5°C and over +35°C
  • When the substrate is excessively wet or in very humid conditions


Professional Render and Adhesive For Thermal Insulation

Packaging & Storage

RASOKOLL is supplied in 25Kg bags and can be stored in a cool dry place for up to 12 months, in its original unopened packaging

Safety Notice

Before using RASOKOLL it is recommended to consult the product safety data sheet available on request

Technical Data

Specific Weight
1400 Kg/m³
Pot Life
Approx 3-4 Hours
Compression Resistance at 28 Days
Category CS IV
Adhesion to Surface
>1.9 N/mm²
Flexure Resistance
Steam Diffusion Resistance Factor
Fire Resistance
Class A1
Thermal Conductivity
0,38 W/mK
Harmfulness According to Norm 88/379
The data and statements in this information sheet refer to laboratory tests in our possession, conducted in standard environmental conditions. Practical applications on site according to these conditions of use may result in different data readings. Due to the wide variety of possible uses and applications, the end-users should independently determine the suitability of the material for their specific purpose prior to use. R.A. & SONS Manufacturing Ltd. reserves the right to make technical modifications of any kind without prior notice.

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