Bona R540 Primer/DPM 6KG

1. What is Bona R540 used for?

Bona R540 is a one-component primer designed to be used on porous and non-porous surfaces prior to applying Bona silane-based adhesives, such as Bona R848. It acts as a moisture barrier and improves the adhesion of the adhesive, making it ideal for problematic or damp subfloors.

2. How do I apply Bona R540?

Bona R540 can be applied using a roller or brush. Ensure the subfloor is clean, dry, and free from dust or contaminants. Apply an even coat and allow it to dry fully before applying the adhesive. For very damp subfloors, a second coat may be required.

3. How long does Bona R540 take to dry?

Under normal conditions (20°C and 60% relative humidity), Bona R540 dries in approximately 1-2 hours. If a second coat is needed, wait for the first coat to dry completely before applying the next layer. The final adhesive application can proceed once the primer is fully dry.

4. What types of subfloors are compatible with Bona R540?

Bona R540 is suitable for a wide range of subfloors, including concrete, screed, plywood, and chipboard. It can be used on both porous and non-porous surfaces, making it a versatile option for various subfloor conditions.

5. Can Bona R540 be used as a moisture barrier?

Yes, Bona R540 acts as a moisture barrier when applied to damp subfloors. It is effective in controlling residual moisture and preventing moisture from affecting the bonding of wood flooring. For subfloors with high moisture levels, multiple coats may be necessary to provide adequate protection.

6. How many coats of Bona R540 should I apply?

In most cases, one coat of Bona R540 is sufficient for normal subfloor conditions. However, for subfloors with higher moisture content or those that are more problematic, a second coat may be required. Always follow the manufacturer’s guidelines for your specific project.

7. Can Bona R540 be used with underfloor heating?

Yes, Bona R540 is compatible with underfloor heating systems. Its moisture barrier properties help protect the wooden floor and adhesive from the effects of fluctuating temperatures and moisture that can occur with underfloor heating.

8. Is Bona R540 environmentally friendly?

Bona R540 is a solvent-free, low VOC product, making it environmentally friendly and safe for indoor use. It is GREENGUARD certified, meeting high standards for indoor air quality.

9. How do I clean up after using Bona R540?

Tools and equipment used to apply Bona R540 can be cleaned with water while the primer is still wet. Once dried, the primer is more difficult to remove, so it’s important to clean tools immediately after use.