HS BASE COAT ACTIVATOR SLOW

What is HS Base Coat Activator Slow and why choose it

HS Base Coat Activator Slow (ALEXSEAL R5521-HS Base Activator Slow) is a halogen-free mixture of organic solvents specifically formulated for industrial serial painting. It is designed to act as the activator (activated reducer) in the ALEXSEAL HS Base Coat system, providing a slower activation and drying profile where required. Used as part of the specified 3:1:1 mixing ratio with ALEXSEAL HS Base Coat and ALEXSEAL HS Base Coat Converter, it supports efficient spray application with reliable film formation and compatibility inside the ALEXSEAL yacht coating system.

Main features

• Dedicated activator for ALEXSEAL HS Base Coat: Used as the HS Base Activator Slow (R5521) within the ALEXSEAL HS Base Coat mixing system.
• Formulated for spray applications: Supports professional spray application processes in industrial painting environments.
• Mixture of organic solvents: Halogen-free composition tailored to the viscosity and application requirements of HS Base Coat.
• High VOC content: VOC content approximately 99.82 % (870 g/l) as per Directive 2010/75/EU.
• Professional use only: Intended for trained personnel in controlled industrial or shipyard environments.

Technical specifications

Product identification

• Commercial product name: ALEXSEAL R5521-HS Base Activator Slow
• Use: Industrial serial painting; activator for ALEXSEAL HS Base Coat
• Chemical nature: Mixture of organic solvents, halogen-free

Packaging

• Standard packaging unit: 1 QT (quart)

Mixing ratio within the HS Base Coat system

• Base coat: 3 parts by volume ALEXSEAL HS Base Coat (Hxxxx)
• Converter: 1 part by volume ALEXSEAL HS Base Coat Converter (C5047)
• Activator: 1 part by volume ALEXSEAL HS Base Activator (R5521 Slow or R5541 Medium)
• Example ratio: 3 : 1 : 1 (base : converter : activator)
• Important: The amount of ALEXSEAL HS Activator is fixed and cannot be changed. Mixed material must be filtered through a suitable paint filter before application.

Physical and chemical properties (Activator Slow)

• Physical state: Liquid (20 – 25 °C, 1,013 hPa)
• Colour: According to product name
• Odour: Characteristic
• Boiling range: Approximately 120 °C
• Flash point: 24 °C (ISO 13736)
• Upper explosion limit: 10.0 % (V)
• Lower explosion limit: 1.0 % (V)
• Auto-ignition temperature: > 400 °C
• pH (10 % solution, 20 °C): 3 – 4
• Viscosity, kinematic: > 6 mm²/s
• Flow time: < 12 s (DIN 53211, 4 mm); < 15 s (ISO 2431, 6 mm)
• Water solubility: Insoluble
• Vapour pressure: Approx. 100 hPa (50 °C)
• Density: Approx. 0.87 g/cm³
• Miscibility with water: Immiscible

Classification and hazards (according to Regulation (EC) No. 1272/2008)

• Flam. Liq. 3 (H226): Flammable liquid and vapour.
• Acute Tox. 4 (H302): Harmful if swallowed.
• Acute Tox. 4 (H332): Harmful if inhaled.
• Skin Sens. 1 (H317): May cause an allergic skin reaction.
• STOT SE 3 (H336): May cause drowsiness or dizziness (central nervous system).
• EUH066: Repeated exposure may cause skin dryness or cracking.

Applications and use cases

• Activator for HS Base Coat on yachts: Used as part of the ALEXSEAL HS Base Coat / Clear Coat system on yacht areas that are not permanently immersed in water.
• Industrial serial painting: Suitable for professional coating processes where controlled activation and slower drying behavior of the HS Base Coat are required.
• Multi-color yacht schemes: When used within the HS Base Coat system, it contributes to fast-drying base layers that can be masked after defined drying times and subsequently sealed with an ALEXSEAL Clear Coat.

FAQ

1. What is the role of HS Base Coat Activator Slow in the ALEXSEAL system?

It serves as the HS Base Activator (activated reducer) in the ALEXSEAL HS Base Coat system, completing the 3:1:1 mix with base coat and converter to achieve the correct application viscosity and curing behavior.

2. In what mixing ratio should I use this activator?

The recommended mixing ratio for the HS Base Coat system is 3 parts by volume HS Base Coat, 1 part by volume HS Base Coat Converter, and 1 part by volume HS Base Activator (Slow or Medium). The activator portion cannot be changed.

3. Can HS Base Coat Activator Slow be used on its own as a coating?

No, it is not a standalone coating. It is designed exclusively as an activator/reducer component within the ALEXSEAL HS Base Coat system.

4. What type of application methods is this activator intended for?

It is intended for spray application as part of the HS Base Coat mixture, using conventional or HVLP spray equipment as specified for the base coat system.

5. Is HS Base Coat Activator Slow suitable for permanently immersed areas?

The HS Base Coat / Clear Coat system, in which this activator is used, is specified for internal or external areas of a yacht that are not subject to permanent water immersion.

6. How flammable is this product?

The activator is classified as a Flammable Liquid Category 3 with a flash point of 24 °C. It must be kept away from heat, hot surfaces, sparks, open flames and other ignition sources.

7. What should I do if the mixed HS Base Coat material exceeds its pot life?

The HS Base Coat mixture has a limited pot life that depends on temperature. Once the effective pot life is exceeded, the material should not be used and must be disposed of according to local regulations.

8. Is there information about coverage rates for the activator alone?

Coverage rates are defined for the HS Base Coat system (base plus converter). The activator is added as a percentage of the total quantity of base and converter. Consultar ficha técnica del fabricante.

Section 14 – Transport information

• UN number / ID number: UN 1263
• UN proper shipping name (ADR / IMDG / IATA): PAINT RELATED MATERIAL
• Transport hazard class: Class 3 (Flammable liquids)
• 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)
• Environmental hazards: Not classified as environmentally hazardous for ADR or marine pollutant for IMDG.
• Special transport advice: When transported within the user’s premises, always move in closed, upright and secure containers and ensure personnel are familiar with procedures in case of incident or spillage.

Section 8 – Individual protective measures

Engineering controls

• Provide adequate ventilation through local exhaust and general extraction to keep solvent vapour concentrations below applicable occupational exposure limits.
• If ventilation is insufficient, suitable respiratory protection must be used.

Personal protective equipment (PPE)

• Eye and 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.
  • Minimum material thickness: > 0.4 mm; breakthrough time: > 480 minutes.
  • Check gloves for workplace suitability and replace them immediately if damaged or worn.
• Skin and body protection: Wear suitable protective clothing adapted to the probability of explosive atmospheres and to prevent skin contact.
• Respiratory protection:
  • If solvent concentration exceeds air limit values, wear a suitable breathing apparatus.
  • Use a half-mask with cartridge or an air-fed respirator, especially when working inside spray booths.
• General protective measures:
  • Do not eat, drink or smoke while using the product.
  • Avoid contact with skin, eyes and clothing.
  • Avoid inhalation of dust from sanding, particulates and spray mist generated during application.