Bona R540 is a single component polyurethane damp proof membrane (DPM) for use on absorbent and non-absorbent sub-floors.
Multipurpose and suitable for use on a range of concrete or cementitious sub-floors, Bona R540 provides a damp-proof layer for the safe and efficient installation of wood floors.
Compatible with silane and polyurethane wood floor adhesives.
Bona R200 can be applied to the following subfloors:
- cementitious screed
- calcium sulphate screed
- OSB or chipboard
- other dry and sound sub-floors
- mastic asphalt screed
- dry screed material
Suitable for use as a moisture barrier (DPM) up to 4 CM% or 85% rH when residual moisture is present in cementitious substrates.
Before using Bona R540 the floor substrate must be even, dry and clean.
It is vital to follow the manufacturer's application instructions on the container to ensure effective use of the product.
Using Bona R540 as a sub-floor primer: the primer must be applied evenly to the substrate using a brush or mohair roller. Allow to dry to a transparent film.
Application of Bona R540 as a sub-floor DPM: Apply the first coat of Bona R540 as above. Wait for 1-2 hours until the surface is dry enough for foot traffic. Apply a second coat.
Please refer to the Bona R540 technical data sheet for full information.