Navimare Polydur Undercoat 7300
Navimare Polydur Undercoat is mainly used as an undercoat for finishing coats. Can be easily sanded to a sound and smooth base coat for Navimare PU Finish and other finishes.
Technical Properties
| Colour / Texture | : White / Matt |
| Volume Solids | : 50% |
| Specific gravity | : 1.4 gr/ml |
| Volatile organic compounds | : 473 gr/liter |
| Flashpoint | : >25°C |
Surface Preparation
- GRP — Ensure surface is dry and free from traces of wax, lubricants and other contaminants. Treat if required with Navimare Gelclean and wash with fresh water. Prime with Navimare Tiecoat 7209.
- Wood — Prime with Navimare Polydur Sealer 7200. Ensure surface is dry prior to recoating.
- Metal — Prime with Navimare Primerkote 7113 or Epoxy Primer 7160.
- Coated substrates — Existing systems should be dry and free from loose paint, salt, grease and other contaminants. High pressure wash with fresh water and allow thorough drying.
Usage Instructions
Substrate should be dry and free from contaminations. Relative humidity less than 90% RH. Mix pack A and pack B well. Do not mix more than can be used in 1 hour. Thin if necessary with the specified thinner. When applied by brush or roller, apply in smooth and gentle strokes crosswise. Avoid excessive application. Apply 1 to 2 coats. Wear protective clothing, goggles and gloves.
Application Data
| Mixing ratio by weight | : Base to hardener: 80 to 20 |
| Mixing ratio by volume | : Base to hardener: 77 to 23 |
| Potlife | : 2 hours at 23°C |
| Dry film thickness per coat | : 100 micron |
| Wet film thickness per coat | : 200 micron |
| Theoretical coverage | : 5.0 sq.m/liter |
| Thinner | : Navimare PU Thinner 7604 |
| Surface Temperature | : Min 1°C / Max 40°C |
Spray Equipment Data
| Conventional Spray | Airless Spray | |
| Nozzle orifice | 1.5–2.2 mm | 0.38–0.53 mm |
| Air pressure | 3–5 bar | 180–300 bar |
| Volume of thinner | 0–15% | 0–3% |
| Practical spreading rate (m²/l) | 2.8 | 3.5 |
Drying and Recoating Times
| Substrate temp. | Dry to recoat | Fully cured | Maximum recoating (1) |
| 10°C | 12 hours | 5 days | Indefinite |
| 23°C | 8 hours | 3 days | Indefinite |
| 30°C | 4 hours | 1 day | Indefinite |
(1) The surface should be dry and free from salts and other contaminants prior to overcoating. The best intercoat adhesion is achieved when the subsequent coat is applied before the preceding coat is fully cured. After prolonged exposure times it may be necessary to roughen the surface in order to ensure intercoat adhesion. When in doubt, consult your nearest Navimare office.
Health and Safety
Observe the precautionary notices on the label of the container. A material safety data sheet is available upon request and national or local safety regulations should be followed.
- Avoid skin and eye contact by wearing overalls, gloves, goggles, mask, etc.
- Spillage on the skin should immediately be removed by thorough washing with lukewarm water and soap or a suitable industrial cleaner.
- Eyes should be flushed with fresh water and medical attention sought immediately.
- Spraying should be carried out under well-ventilated conditions. Avoid inhalation of solvent vapours and paint mist by wearing an air mask.
- This product contains flammable materials and should be kept away from sparks and open flames. Smoking in the area should not be permitted.
Disclaimer
The information in this data sheet is provided to the best of our knowledge. However, we have no control over either quality or condition of the substrate and other factors affecting the use and application of this product. Therefore, we cannot accept any liability whatsoever or howsoever arising from the performance of the product or for any loss or damage arising from the use of this product. We reserve the right to change the product without notice.
