HS CLEAR COAT CLEAR GLOSS LN

What is ALEXSEAL HS Clear Coat Clear Gloss LN and why choose it

ALEXSEAL HS Clear Coat Clear Gloss LN is a high-solid, two-component polyurethane clear coat developed by Alexseal for professional yacht finishing. Used as a transparent high-gloss top layer over ALEXSEAL HS Base Coat, it delivers a deep wet-look appearance with excellent gloss retention, even under extreme weather conditions. Its specific formulation helps reduce cleaning and maintenance effort while preserving the visual appearance and value of the yacht.

Once fully cured, ALEXSEAL HS Clear Coat Clear Gloss LN provides outstanding resistance to UV radiation, salt water, abrasion and fuel, making it a durable solution for high-end marine coatings in areas not exposed to permanent water immersion.

Main features

• High-solid 2K polyurethane clear coat: Transparent, two-component system with high solids content for efficient film build.
• Extreme high-gloss “wet look” finish: Produces a deep, high-distinction image that enhances the underlying ALEXSEAL HS Base Coat color.
• Long-term durability: Excellent resistance to UV, salt water, abrasion and fuel after full curing.
• Reduced maintenance: Surface characteristics help decrease cleaning and upkeep requirements while maintaining appearance.
• Interior and exterior use: Suitable for yacht surfaces above the waterline, in areas not subject to permanent immersion.
• Spray-application optimized: Viscosity and application parameters are tailored for professional spray equipment (conventional and HVLP).
• Part of a system: Designed specifically to be used over ALEXSEAL HS Base Coat as a clear coat in a base coat / clear coat system.

Technical specifications

Product identity

• Commercial name: HS Clear Coat Clear Gloss LN
• Brand: Alexseal
• System role: Clear coat over ALEXSEAL HS Base Coat
• Type: Two-component polyurethane, high-solid (HS)
• Color/appearance: Transparent, clear gloss

Composition and solids

• Chemical nature: Mixture of synthetic resins and organic solvents
• Volume solids (catalyzed, without reduction): 50%

Coverage (HS Clear Coat)

Coverage values are calculated for base and converter. Activator is added as percentage of the total base and converter quantity.

• Theoretical coverage: 15 m²/l (57 m²/gal, 627 sq. ft./gal) at 35 µm (1.4 mils) DFT
• Practical coverage with conventional air spray: 9 m²/l (34.2 m²/gal, 376 sq. ft./gal) at 35 µm (1.4 mils) DFT
• Practical coverage with HVLP spray: 11.3 m²/l (42.8 m²/gal, 470 sq. ft./gal) at 35 µm (1.4 mils) DFT

Packaging and trade names

• Base material: H0150 ALEXSEAL HS Clear Coat – 1 gallon
• Converter: C5067 ALEXSEAL HS Clear Coat Converter – 1 gallon
• Activator medium: R5561 ALEXSEAL HS Clear Activator Medium – 1 gallon
• Activator slow: R5531 ALEXSEAL HS Clear Activator Slow – 1 gallon

Mixing ratio (by volume)

• 1 part H0150 ALEXSEAL HS Clear Coat (base)
• 1 part C5067 ALEXSEAL HS Clear Coat Converter
• 1 part ALEXSEAL HS Clear Activator (R5561 or R5531)

Example: 1 : 1 : 1 = 50% reduction. The amount of ALEXSEAL HS Clear Activator (activated solvent) is fixed and must not be changed. Mixed material must be filtered through a suitable paint filter before application.

Application parameters (HS Clear Coat)

• Application method: Spray application only (conventional or HVLP)
• Clear coat viscosity:
  • Zahn No. 2 cup: approx. 19 – 21 s
  • DIN 4 cup (4 mm): approx. 15 – 17 s
  • ISO 3: approx. 45 s
• Nozzle size (gravity gun): 1.0 – 1.3 mm (0.040 – 0.051 in) – conventional and HVLP
• Nozzle size (siphon/standard spray gun): 1.0 – 1.3 mm (0.040 – 0.051 in) – conventional and HVLP
• Fluid nozzle size (pressure pot): 0.8 – 1.0 mm (0.032 – 0.040 in) – conventional and HVLP
• Atomizing pressure: 2.5 – 4.0 bar (40 – 60 psi) – conventional and HVLP
• Pot pressure (pressure pot systems): 0.5 – 1.2 bar (7 – 16 psi) – conventional and HVLP

Recommended environmental conditions

• Optimal application range (ambient): min. 15°C (60°F) at 40% RH to max. 30°C (85°F) at 80% RH
• Minimum surface temperature during drying: 15°C (60°F)
• Ideal temperature: 25°C (77°F)
• Minimum application conditions: at least 3°C (5.4°F) above the dew point

Film build and spray process

ALEXSEAL HS Clear Coat is designed as part of a base coat / clear coat system and must be applied in 2 steps by spray.

1. After the ALEXSEAL HS Base Coat has dried, apply 2 cross coats of ALEXSEAL HS Clear Coat to seal the base coat.
2. Wet film thickness (WFT): 80 – 100 µm (3 – 4 mils) per cross coat.
3. Flash-off/evaporation time between cross coats: approximately 30 minutes to 4 hours.
4. Resulting dry film thickness (DFT): 60 – 100 µm (2.4 – 4 mils) after two cross coats.
5. Use freshly prepared material for the second application.

Pot life and drying (HS Clear Coat)

Approximate times for mixed material and curing at specified temperatures:

Condition	15°C (60°F)	20°C (68°F)	25°C (77°F)	30°C (85°F)	Max. dry time
Effective pot life (approx.)	3 h	2.5 h	2 h	1.5 h	N/D
Dust-free	3 h	3 h	2 h	2 h	N/D
Masking tape dry	36 h	30 h	24 h	16 h	N/D
Sanding dry	36 h	30 h	24 h	16 h	N/D
Fully cured	10 days	7 days	7 days	7 days	N/D
Reapply ALEXSEAL HS Clear Coat once dry	90 min	60 min	60 min	45 min	3 days

These values are approximate minimum and maximum times. Surface temperature, air flow, direct or indirect sunlight, solvent quantity/type and film thickness will influence tack, sanding, recoat and drying times.

Relevant data from HS Base Coat (system context)

ALEXSEAL HS Clear Coat Clear Gloss LN is intended to be used over ALEXSEAL HS Base Coat as part of a multi-step system.

• HS Base Coat type: Fast-drying high-solid two-component polyurethane base coat with excellent hiding power.
• System performance with ALEXSEAL Clear Coat: Shows excellent chemical and mechanical resistance and is extremely glossy and color stable.
• HS Base Coat coverage (for reference):
  • Volume solids (catalyzed, no reduction): 55 – 70% depending on color.
  • Theoretical: 11 m²/l (42 m²/gal, 462 sq. ft./gal) at 50 µm (2 mils) DFT.
  • Practical (conventional spray): 5.5 m²/l (20.8 m²/gal, 224 sq. ft./gal) at 50 µm (2 mils) DFT.
  • Practical (HVLP): 6.8 m²/l (26 m²/gal, 280 sq. ft./gal) at 50 µm (2 mils) DFT.
• System application (summary):
  1. Apply ALEXSEAL HS Base Coat by spray (1–2 coats, depending on color) to a WFT of 40 – 60 µm per coat, with 30 minutes flash-off at 20°C, not exceeding 120 µm WFT in total.
  2. After minimum drying time of HS Base Coat, overcoat with ALEXSEAL Clear Coat (HS Clear Coat Clear Gloss LN) to seal and protect.
  3. For higher gloss and durability, an additional clear coat application can be applied after sanding, without breaking through the existing clear layer.

Applications and use cases

• Yacht exterior surfaces above the waterline: Ideal for topsides and superstructures where a deep, long-lasting gloss and color stability are required, without permanent water immersion.
• Yacht interior areas: Can be used in interior zones where high-gloss decorative finishes and good chemical resistance are required.
• Multi-color schemes: ALEXSEAL HS Base Coat is suitable for multi-color yacht designs, which can then be uniformly overcoated with HS Clear Coat Clear Gloss LN for protection and gloss.
• High-end refits and new builds: Suitable for professional boatyards and refinishers needing a durable, high-image clear system over ALEXSEAL HS Base Coat.

FAQ

1. Can ALEXSEAL HS Clear Coat Clear Gloss LN be used below the waterline?

No. The ALEXSEAL HS Base Coat / HS Clear Coat system is designed for areas not subject to permanent water immersion.

2. Is this clear coat intended for professional or DIY use?

The product documentation specifies “Professional Use Only,” so it is intended for trained professional applicators.

3. How many coats of HS Clear Coat should be applied?

After the HS Base Coat has dried, apply 2 cross coats of ALEXSEAL HS Clear Coat Clear Gloss LN at 80 – 100 µm WFT per cross coat, resulting in 60 – 100 µm DFT.

4. What is the correct mixing ratio?

Mix 1 part H0150 HS Clear Coat base, 1 part C5067 Converter and 1 part ALEXSEAL HS Clear Activator (R5561 or R5531). The activator amount is fixed and must not be changed.

5. What is the pot life of the mixed product?

Approximate effective pot life is 3 h at 15°C, 2.5 h at 20°C, 2 h at 25°C and 1.5 h at 30°C.

6. When can I sand the clear coat?

At 20°C, sanding is possible after approximately 30 hours; at 25°C after about 24 hours; and at 30°C after about 16 hours, according to the technical data sheet.

7. How long does it take until the coating is fully cured?

The clear coat is fully dry after about 10 days at 15°C, or 7 days at 20–30°C.

8. Can I reapply HS Clear Coat on top of an existing clear layer?

Yes. The product can be reapplied once the surface is dry. Recoat windows range from 90 minutes at 15°C to 45 minutes at 30°C, with a maximum of 3 days.

9. Is special ventilation required during application?

The safety data sheet recommends adequate local exhaust and general ventilation. If vapour concentrations exceed occupational exposure limits, suitable respiratory protection must be used.

Section 14 – Transport information

• UN number / ID number: UN 1263
• UN proper shipping name: PAINT
• Transport hazard class: Class 3 (flammable liquid)
• Packing group: III
• ADR classification code: F1
• ADR hazard identification number: 30
• ADR tunnel restriction code: (D/E)
• IMDG EmS code: F-E, S-E
• IATA packing instructions: 366 (cargo aircraft), 355 (passenger aircraft), Y344 (limited quantities)
• Labels: Flammable Liquids (Class 3)
• Environmental hazards: Not classified as environmentally hazardous under ADR or as a marine pollutant under IMDG.
• Special note for internal transport: When transported within the user’s premises, the product must always be moved in closed, upright and secure containers. Personnel handling these containers should be familiar with emergency and spill procedures.

The transport classifications above refer to the unpackaged material as described in the Safety Data Sheet. They may vary depending on transport mode, packaging size and regional regulations.

Section 8 – Personal protective measures

Exposure controls

• Provide adequate ventilation, preferably through local exhaust and good general extraction.
• If ventilation is insufficient to keep solvent vapour below workplace exposure limits, use appropriate respiratory protection.

Individual protection equipment

• Eye/face protection: Wear safety goggles to protect against solvent splashes.
• Hand protection:
  • Use chemical-resistant protective gloves tested according to EN 374.
  • Recommended materials for short-term contact (splash protection): nitrile rubber or neoprene.
  • Recommended thickness: > 0.4 mm, with breakthrough time > 480 minutes.
  • Check gloves for workplace suitability and replace immediately if damaged or worn.
• Skin and body protection: Wear suitable protective clothing, adapted to the likelihood of potentially explosive atmospheres.
• Respiratory protection:
  • If solvent concentration exceeds air limit values, wear a suitable breathing apparatus (e.g. half mask with cartridge or air-fed system).
  • Dry grinding, torch cutting or welding may generate hazardous dust or vapour; use wet methods where possible and/or additional extraction and respiratory protection.
• General protective measures:
  • No eating, drinking or smoking in the work area.
  • Avoid contact with skin, eyes and clothing.
  • Avoid inhalation of dust from sanding, spray mist and vapours.
  • When working inside a spray booth where ventilation may be insufficient, operators should wear compressed air-fed respirators until particulate and vapour concentrations are below exposure limits.

*Contenido generado por IA