|No. of coats||1|
|Drying time||24 hrs|
Bona R540 is a multi-purpose primer / damp-proof membrane for both absorbent and non-absorbent subfloors. It can be used for damp-proofing concrete or cementitious subfloors with up to 4 CM% in humidity.
Bona R540 is compatible with all Bona silane and polyurethane adhesives, including:
|Bona R848 Adhesive||An elastic, one-component, silane-based adhesive for installing engineered timber products or narrow solid boards|
|Bona R850 Adhesive||An elastic, one-component, silane-based adhesive for parquet flooring and most other types of timber products|
|Bona Titan||A hard-formulated, silane-based adhesive for all physically sound sub-floors|
The substrate must be even, totally dry, clean, free from cracks and physically sound. The surface should also be slightly textured. If necessary, it should be professionally prepared for laying.
Always apply a small test area before beginning any project to assess consistency and compatibility of the product. Follow the manufacturer's instructions on the container at all times. Before use, the following climatic conditions must be met (values for Central Europe):
The primer itself must, if necessary, be brought to the right temperature.
Please see minimum drying time for the different adhesives in the table below:
High relative air humidity and temperature will shorten the drying time; low air humidity and temperature will lengthen the drying time. When in doubt a longer drying time is recommended.