Mapei Mapecoat PU 20 N
Mapei Mapecoat PU 20 N is a coloured protective topcoat for membranes from the Purtop range with high level of elasticity and excellent resistance to abrasion.
Best Uses
Mapecoat PU 20 N is a two-component, solvent-based, aliphatic polyurethane topcoat. This flooring topcoat benefits from elasticity, which makes it suitable for coating membranes from the Purtop range.
- Resistant to UV rays and atmospheric agents
- Good hydrolysis stability
- Highly attractive shiny finish
- Easy to clean and resistant to the growth of mould and fungus
- Available in various RAL colours
Application
Substrate preparation
If the substrate to be treated has been coated with a membrane from the Mapei Purtop range, it must be structurally sound and free of loose areas, dust, dirt, grease, oil and any other material or substance that could affect adhesion of the finish to the substrate. When applying Mapecoat PU 20 N by spray on polyurethane membranes from the Purtop range which have been installed for over 24 hours, roughen the surface by sanding (remove all dust with a vacuum cleaner). Then apply Mapei Primer R30 one-component polyurethane primer.
Preparation of the product
Prepare Mapecoat PU 20 N with an electric mixer. To prepare the mix, blend the two components separately with an electric mixer at low-speed, pour the contents of component B into the container of component A and mix for a few minutes until they are thoroughly blended; make sure you only prepare an amount that can be used within the maximum workability time (approximately 60 minutes at +23°C). If a higher degree of non-slip finish is required, add micronized polyamide Mapei Mapecoat Filler to Mapecoat PU 20 N at a rate of 7% of the weight of component A while mixing at low-speed.
Application of the product
Apply two coats of Mapecoat PU 20 N with a roller, making sure the total consumption rate is never less than 0.3 kg/m². The product may also be applied by airless spray; in such cases it must be diluted with maximum 5% of Mapei Thinner PU. If the topcoat is applied with a roller, it is recommended to spread it out evenly and apply it in criss-cross strokes to get a quality, attractive finish.
IMPORTANT NOTICE: From 24th August 2023, adequate training is required before industrial or professional use of this product. Training can be accessed at: https://www.safeusediisocyanates.eu

| Components: | Two Pack |
| Type: | Aliphatic polyurethane |
| Finish: | Shiny |
| Stock Colours: | Various RAL shades |
| Tintable: | No |
| VOC Content: | |
| Volume Solids: | 71% |
| Suitable Substrates: | Pre Painted Mapei Purtop Coatings |
| Application Method: | Roller, Airless Spray |
| Theoretical Coverage: |
0.15-0.2 kg/m² per coat. In general, the consumption rates below are for a seamless film on a flat surface and will be higher on uneven |
| Wet Film Thickness (WFT): | |
| Dry Film Thickness (DFT): | |
| Induction Time: | - |
| Pot Life: | 60 minutes at 23°C |
| Foot Traffic Ready: | 24 hours at 23°C |
| Overcoatable: | |
| Fully Cured: | |
| Cleaner / Thinner: | Tools used to mix and apply the product may be cleaned with thinners before it hardens. Once hardened, it may only be removed mechanically from tools and mixers. |
| Shelf Life: | Mapecoat PU 20 N may be stored for 12 months in its original packaging in a covered, dry area at a temperature of +5°C to +35°C. |
| Packaging: | Available in 15 Kg |