Navimare Hydrostop 7480
Navimare Hydrostop is a solvent-free epoxy especially designed as a protective system against osmosis of GRP hulls. The product can be applied up to 250 micron dry film thickness in a single coat easily. The total system of 2–3 coats of Hydrostop offers a complete water resistant barrier around the hull.
Technical Properties
| Colour / Texture | : Pale yellow / Semi-gloss |
| Volume Solids | : 100% |
| Specific gravity | : 1.1 gr/ml |
| Flashpoint | : >100°C |
Surface Preparation
New GRP — Ensure surface is dry and free from traces of wax, lubricants and other contaminants. Treat if required with Navimare Gelclean. Sand with a coarse grade of sandpaper. Wash with fresh water and allow drying. It is advised to measure the moisture content of the hull before paint application to ensure the hull is completely dry. Apply 3 coats of 150–200 micron each. Treatment of osmosis — Remove all affected gelcoat and/or GRP by blast cleaning or by using power tools. Then proceed as described above.
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 0–5% of the specified thinner. When applied by brush or roller, apply in smooth and gentle strokes crosswise. Avoid excessive application. The total system dry film thickness should have a minimum of 450 microns. Apply the total Hydrostop system in a one-coat-per-day routine. Avoid recoat intervals longer than 48 hours. Wear protective clothing, goggles and gloves.
Application Data
| Mixing ratio by weight | : Base to hardener: 65 to 35 |
| Mixing ratio by volume | : Base to hardener: 62 to 38 |
| Potlife | : 2 hours at 23°C |
| Dry film thickness per coat | : 150 micron |
| Wet film thickness per coat | : 150 micron |
| Theoretical coverage | : 6.6 sq.m/liter |
| Thinner | : Navimare Epoxy Thinner 7603 |
| Surface Temperature | : Min 5°C / Max 40°C |
Spray Equipment Data
| Conventional Spray | Airless Spray | |
| Nozzle orifice | 1.5–3.0 mm | 0.38–0.53 mm |
| Air pressure | 3–5 bar | 180–300 bar |
| Volume of thinner | 0–10% | 0–3% |
| Practical spreading rate (m²/l) | 3.6 | 4.6 |
Drying and Recoating Times
| Substrate temp. | Dry to recoat | Fully cured | Maximum recoating (1) |
| 10°C | 24 hours | 10 days | 4 days |
| 23°C | 16 hours | 7 days | 2 days |
| 30°C | 16 hours | 4 days | 1 day |
(1) The surface should be dry and free from salts and other contaminants prior to overcoating. When the maximum recoat time has been exceeded or after prolonged exposure times it is 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.
