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HLaqua PU 6343

Product Overview
HLaqua PU 6343 is a water-based aliphatic polyurethane long-lasting topcoat with excellent color and gloss retention. The paint film has both hardness and elasticity, high gloss, good brightness and fullness. It is suitable for new steel structures and maintenance fields.
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Description

Physical properties

Color / Gloss by color card / No Highlights

Volume solid content 53%

Flash point >25 ℃

Volatile organic content ( VOC ) < 50g / L

Density approx. 1.25 g / centimeter 3



Dry film thickness ( μm )

Wet film thickness ( μm )

Theoretical coating rate ( m2 / L )

Film thickness range

30 – 80

57 – 150

17.7 – 6.6

Recommended film thickness

50

95

10.6


Construction instructions

Mixing ratio base material: curing agent =5 ∶ 1 (weight ratio )

Applicable time after mixing at 10 ℃: 10 Hours, 23 °C: 6 Hours, 30 °C: 3 Hour

Brush or roller coating is only recommended for pre-coating and small area coating , but the specified dry film thickness must be achieved. 

Dilution ratio: 5-15%

Airless spray nozzle pressure: 14-18 MPa 

Nozzle aperture : 0.33-0.48 mm 

Spraying angle : 40-80 Spend

Dilution ratio: 0-5% (volume ratio)

Air spray nozzle pressure: 0.3-0.5 MPa 

Nozzle aperture : 1.2-1.5 mm 

Dilution ratio: 0-10% (volume ratio )

Thinner / cleaner pure water

It is recommended to add an appropriate amount of diluent after the paint base and curing agent components are evenly mixed.

Avoid adding excessive amounts of thinner, which will reduce sag resistance and extend curing time.


Drying time and time between recoating (1)

Substrate temperature

 Dry time

 Working time

 Fully cured

Recoating interval (2)

Shortest

longest

10 ℃

6 hours

24 hours

15 days

8 hours

No restrictions

23 ℃

3 hours

12 hours

10 days

6 hours

No restrictions

30 ℃

1 hour

8 hours

7 days

3 hours

No restrictions

(1)The data is for reference only. The actual drying time and recoating interval depend on factors such as paint dry film thickness, ventilation, humidity and previous paint.

(2)The surface must be dry and free of dirt before recoating. The adhesion of subsequent coatings is best when the previous coating is completely cured. If the coating is exposed for a long time, the surface must be roughened before recoating to ensure adhesion between the coatings.


Surface treatment

The painted surface must be dry ; SSPC-SP1 According to the regulations , use solvent to remove all grease from the surface ; use clean water to remove salt and stains from the surface . The corroded area must be repaired with a suitable primer .


Construction conditions

The surface temperature of the substrate shall not be lower than 5 °C and at least 3 °C higher than the air dew point temperature, and the relative humidity shall not exceed 85% (the temperature and relative humidity shall be measured near the substrate).

The surface temperature of the substrate should not exceed 40°C . Otherwise, a suitable spraying method should be selected and appropriate diluent should be added as required to prevent dry spraying. In extreme cases, the dry film thickness of the coating can be appropriately reduced to prevent sagging.

When painting in a confined space, appropriate ventilation equipment must be provided to ensure the cure of the paint film.

After the base material and curing agent are mixed, the temperature must be higher than 15 ℃, otherwise diluent should be added to achieve the required viscosity for construction.


Recommended Package

The following are typical coating systems exposed to air:

6179 water-based epoxy zinc-rich primer

1 × 50μm

(Dry film thickness)

6219 water-based epoxy intermediate paint

1 × 75μm

(Dry film thickness)

6343 water-based polyurethane topcoat

1 × 50μm

(Dry film thickness)


Store

Must be stored in accordance with national regulations. The storage environment should be dry, cool, well-ventilated, avoid high temperatures and stay away from fire. The packaging container must be kept sealed. The storage validity period is at least 6 months.


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