Bona R850 Adhesive is perfect for the installation of engineered planks and other types of wooden flooring. The adhesive hardens by a chemical reaction with moisture and is able to resist against movement of wood during expansion. It causes practically no swelling of the wood as it's water and solvent free. Suitable substrates (also in association with under floor heating) are:
The substrate must be structurally sound, clean, dry and free from surface dust, dirt and debris. The surface should be slightly textured for best adhesion. Substrates may need to meet the requirements of local standards and codes of practice before floors are laid. It may be necessary for substrates to be professionally prepared for laying.
Please Note: Wood flooring must not be installed before the compound has fully cured. Do not install over expansion joints or other moving joints in a concrete slab.
Always do a test area before starting any project to check suitability and compatibility, following the manufacturer's instructions on the container at all times.
Before use, ensure the air temperature is above 18°C, the floor temperature is above 15°C (with under floor heating max 20°C) and the relative humidity is less than 70%. The adhesive itself must, if necessary, be brought to the right temperature.
Use a fine trowel for small pieces of wood and/or smooth substrates, and a coarse trowel for large pieces of wood and/or less smooth and rough surfaces (F = fine, G = coarse) Bona Adhesive Trowel
The adhesive consumption during the application with the Bona OptiSpread system depends mainly on the walking speed as well as the adjusted air pressure (OptiSpread 100, OptiSpread 2.0). Please refer to respective machine manual.
For full application and coverage details, please refer to the 'Technical Information' Datasheet link above.
It is possible to apply load and stress to the floor after approximately 24 to 48 hours. Any sanding and surface coating to be applied, may be carried out after 1 to 4 days depending on the type of parquet, absorbency of the substrate and room climate.
Q. What is the difference between Bona R850 and Bona R848?
A. The R850 provides a higher spec and shear strength compared to Bona R848. The Bona R848 is more flexible and designed for installing parquet flooring or narrow, solid boards (less than 190mm width) and can be used on both wood and concrete substrates. Bona R850 can be used for solid, engineered wooden floors and nearly all sub floors.