HS CLEAR COAT CONVERTER

What is ALEXSEAL HS Clear Coat Converter and why choose it

ALEXSEAL HS Clear Coat Converter C5067 is the dedicated polyisocyanate-based hardener for the ALEXSEAL HS Clear Coat system. Designed for professional and industrial serial painting, it is an essential component in the high solid, two-component polyurethane clearcoat used over ALEXSEAL HS Base Coat. When correctly mixed with the clearcoat base and activator, it helps deliver a durable, high-gloss wet-look finish with excellent gloss and color stability, even under demanding climatic conditions typically encountered in marine environments.

Main features

• Designed for ALEXSEAL HS Clear Coat system – Used as the converter in a 3-component, high solid polyurethane clearcoat.
• Professional, industrial use – Intended for industrial serial painting and professional yacht coating applications.
• High-gloss, wet-look finish (system property) – In combination with ALEXSEAL HS Clear Coat, provides an extreme high-gloss, wet-look topcoat for base coat / clear coat systems.
• Durability (system property) – The complete HS Clear Coat system offers very good resistance to UV, saltwater, abrasion and fuel, helping maintain appearance and value.
• Spray application – Optimized for conventional and HVLP air spray equipment, including gravity gun, siphon cup and pressure pot systems.
• Controlled curing – Converter reacts with the clearcoat base and activator to achieve the specified pot life, drying and full-cure characteristics of the HS Clear Coat system.
• Flammable – Classified as a flammable liquid, Category 3 (flash point approx. 25 °C).
• Hazard-labelled – Harmful if inhaled, may cause an allergic skin reaction and respiratory irritation; harmful to aquatic life with long-lasting effects.

Technical specifications

Product identity

• Commercial product name: ALEXSEAL C5067-HS Clear Coat Converter
• Chemical nature: Hardener based on polyisocyanates
• Intended use: Industrial serial painting; converter for ALEXSEAL HS Clear Coat

Mixture and system data

• System components (trade names):
  • H0150 ALEXSEAL HS Clear Coat (base)
  • C5067 ALEXSEAL HS Clear Coat Converter (this product)
  • R5561 ALEXSEAL HS Clear Coat Activator Medium
  • R5531 ALEXSEAL HS Clear Coat Activator Slow
• Mixing ratio (by volume):
  • 1 part H0150 ALEXSEAL HS Clear Coat
  • 1 part C5067 ALEXSEAL HS Clear Coat Converter
  • 1 part ALEXSEAL HS Clear Coat Activator (R5561 or R5531)
• Example: 1 : 1 : 1 corresponds to 50% reduction (system data).
• Activator amount: The amount of ALEXSEAL HS Clear Coat Activator (activated reducer) is fixed and cannot be changed.
• Mixed material: Must be filtered with a suitably sized paint filter prior to application.
• Volume solids (system, catalyzed without reduction): 50%

Application parameters (system with converter)

• Application method: Spray application as part of a base coat / clear coat finish applied in two steps.
• Recommended nozzle sizes:
  • Gravity gun: 1.0 – 1.3 mm (0.040 – 0.051 inch) – conventional and HVLP
  • Siphon cup: 1.0 – 1.3 mm (0.040 – 0.051 inch) – conventional and HVLP
  • Pressure pot (fluid nozzle): 0.8 – 1.0 mm (0.032 – 0.040 inch) – conventional and HVLP
• Atomizing pressure: 2.5 – 4.0 bar (40 – 60 PSI) – conventional and HVLP
• Pot pressure: 0.5 – 1.2 bar (7 – 16 PSI) – conventional and HVLP
• Viscosity (clearcoat layer):
  • Zahn #2 Signature: approx. 19 – 21 s
  • DIN 4 cup, 4 mm: approx. 15 – 17 s
  • ISO 3: approx. 45 s

Film build and coverage (system with converter)

• Application sequence: After ALEXSEAL HS Base Coat has dried, apply 2 cross coats of ALEXSEAL HS Clear Coat to seal the base coat.
• Wet film thickness (WFT): 80 – 100 µm (3 – 4 mils) per cross coat
• Flash-off time between cross coats: 30 minutes to 4 hours
• Resulting dry film thickness (DFT): 60 – 100 µm (2.4 – 4 mils) in two cross coats

Pot life and drying of HS Clear Coat (system data)

Optimal application environment: 15 °C (60 °F) / 40% RH up to 30 °C (85 °F) / 80% RH.

During drying, the minimum temperature is 15 °C (60 °F). Ideal temperature: 25 °C (77 °F).

Physical and chemical properties (converter)

• Appearance: Liquid
• Colour: According to product name
• Odour: Characteristic
• Boiling range: approx. 120 °C
• Flash point: 25 °C (ISO 2719)
• Upper explosion limit: 10.0 % (V)
• Lower explosion limit: 1.0 % (V)
• Vapour pressure: approx. 100 hPa (50 °C)
• Density: approx. 1.08 g/cm³ (20 °C)
• Water solubility: Insoluble
• Auto-ignition temperature: > 400 °C
• Flow time: 65 s (DIN 53211, 4 mm) / 44 s (ISO 2431, 6 mm)

VOC information

• Directive 1999/13/EC: VOC content (excluding water) 25%, 270 g/l

Storage conditions

• Storage temperature: 5 – 35 °C
• Keep containers tightly closed and stored upright in a cool, dry, well-ventilated place.
• Always store in containers made of the same material as the original packaging.
• Avoid heating and direct sunlight.
• Prevent exposure to atmospheric humidity or water; reaction with water forms CO₂, which can pressurize closed containers.
• Do not keep containers fully sealed; follow the supplier’s guidance.
• Keep away from oxidising agents and strongly acidic or alkaline materials.
• Prevent unauthorised access; no smoking in storage areas.

Applications and use cases

• Yacht and marine coatings (system use): As part of the ALEXSEAL HS Clear Coat system over ALEXSEAL HS Base Coat, for high-gloss, high-value yacht exteriors and interiors in areas not subject to permanent water immersion.
• Industrial serial painting: Designed for professional, controlled spray booths and industrial finishing lines where consistent curing and finish quality are required.
• High-gloss topcoats: Used wherever an extreme high-gloss, wet-look clearcoat is needed as a protective finishing layer within the ALEXSEAL HS system.

FAQ – ALEXSEAL HS Clear Coat Converter C5067

1. What is ALEXSEAL HS Clear Coat Converter used for?

   It is the polyisocyanate-based hardener used in combination with ALEXSEAL HS Clear Coat and HS Clear Coat Activator to form a high solid, two-component polyurethane clearcoat over ALEXSEAL HS Base Coat.

2. What is the correct mixing ratio?

   The HS Clear Coat system is mixed 1 part H0150 HS Clear Coat, 1 part C5067 HS Clear Coat Converter and 1 part HS Clear Coat Activator (R5561 or R5531) by volume (1:1:1).

3. Can the amount of activator or converter be adjusted?

   No. The amount of ALEXSEAL HS Clear Coat Activator is fixed and cannot be changed. The converter is also used at the specified 1:1:1 mixing ratio.

4. How should the mixed clearcoat be applied?

   Apply by spray in two cross coats over ALEXSEAL HS Base Coat, with a wet film thickness of 80 – 100 µm (3 – 4 mils) per cross coat and a flash-off time of 30 minutes to 4 hours between coats.

5. What pot life can I expect?

   Depending on temperature, pot life for the HS Clear Coat system is approximately 3 hours at 15 °C, 2.5 hours at 20 °C, 2 hours at 25 °C and 1.5 hours at 30 °C.

6. What are the main hazards of HS Clear Coat Converter?

   It is a flammable liquid and vapour (Category 3), harmful if inhaled, may cause an allergic skin reaction, may cause respiratory irritation, and is harmful to aquatic life with long-lasting effects.

7. How should the product be stored?

   Store at 5 – 35 °C in a cool, dry, well-ventilated place, in tightly closed original-type containers, away from heat, ignition sources, oxidising agents and strong acids or alkalis, and protected from moisture.

8. Is special ventilation required during use?

   Yes. Adequate ventilation is required. Where local exhaust and general extraction cannot keep concentrations below occupational exposure limits, suitable respiratory protection must be worn.

9. Can contaminated packaging be reused?

   Contaminated packaging should be emptied as far as possible and, after appropriate cleaning, may be taken for reuse. Packaging that cannot be cleaned should be disposed of according to local regulations.

10. What is the waste code for unused product?

    The recommended European Waste Catalogue code is 08 01 11 – waste paint and varnish containing organic solvents or other dangerous substances.

Section 14 – Transport information

• UN number (ADR/IMDG/IATA): UN 1263
• UN proper shipping name: PAINT RELATED MATERIAL
• Transport hazard class: 3 (Flammable liquids)
• Packing group: III
• ADR details:
  • Classification code: F1
  • Hazard identification number: 30
  • Labels: 3
  • Tunnel restriction code: (D/E)
  • Special provision: 640E
  • Environmentally hazardous: no
• IMDG details:
  • Class: 3
  • Packing group: III
  • Labels: 3
  • EmS code: F-E, S-E
  • Marine pollutant: no
• IATA details:
  • Class: 3
  • Packing group: III
  • Packing instruction (cargo aircraft): 366
  • Packing instruction (passenger aircraft): 355
  • Labels: Flammable Liquids
• Special precautions for user:
  • Within user’s premises, transport only in closed, upright and safe containers.
  • Ensure handlers are aware of procedures in case of incident or spillage.
  • Receptacles < 450 L are not subject to ADR 2.2.3.1.5.
  • Receptacles < 30 L are not subject to IMDG chapters 4.1, 5.2 and 6.1 (IMDG 2.3.2.5).
  • Transport in bulk according to Annex II of MARPOL 73/78 and the IBC Code: Not applicable for the product as supplied.

Section 8 – Personal protective measures

Exposure controls

• Provide adequate ventilation; use local exhaust ventilation and good general extraction where practicable.
• If ventilation does not keep vapour concentrations below occupational exposure limits, suitable respiratory protection must be worn.

Personal protective equipment (PPE)

• Eye protection: Safety goggles protecting against solvent splashes.
• Hand protection:
  • Use chemical-resistant protective gloves tested in compliance with EN 374.
  • Recommended materials for short-term contact (splash protection): nitrile rubber or neoprene.
  • Minimum material thickness: > 0.4 mm.
  • Minimum breakthrough time: > 480 minutes.
  • Gloves must be checked for suitability at the specific workplace and replaced immediately if damaged or worn.
  • Preventive skin protection (skin protection cream) is recommended; wash contaminated skin immediately.
• Skin and body protection:
  • Wear antistatic clothing made of natural fibre or high temperature resistant synthetic fibre.
  • All parts of the body should be washed after contact.
• Respiratory protection:
  • By spraying: use an air-fed respirator.
  • For other operations in well-ventilated areas: air-fed respirators may be replaced by a combination charcoal filter and particulate filter mask.

General protective measures and handling advice

• Persons with a history of asthma, allergies, or chronic/recurrent respiratory disease should not work with this preparation.
• Do not eat, drink or smoke during work.
• Avoid contact with skin, eyes and clothing.
• Avoid inhalation of vapours, dust from sanding, particulates and spray mist.
• Prevent formation of flammable or explosive vapour concentrations; keep away from heat, hot surfaces, sparks, open flames and other ignition sources.
• Use earthing leads when transferring product between containers; wear antistatic footwear and clothing.