What is ALEXSEAL TOPCOAT 501 Converter Brush and why choose it?
ALEXSEAL C5012 TOPCOAT 501 Converter Brush is a polyisocyanate-based hardener designed specifically for brushing and rolling applications of ALEXSEAL Premium Topcoat 501. As part of the 2K polyurethane system, it ensures proper curing, high gloss and long-term durability of the yacht coating when applied with brush or roller in professional environments.
Engineered for industrial serial painting and marine refinishing, this converter offers reliable performance, controlled pot life and compatibility with the ALEXSEAL R5015 Topcoat Reducer Brush for fine-tuned application characteristics.
Main features
- Dedicated hardener for brush/roll: Formulated for use with ALEXSEAL Premium Topcoat 501 applied by brush or roller.
- Polyisocyanate-based chemistry: Ensures complete curing, mechanical resistance and chemical resistance of the finished topcoat.
- Professional-grade product: Intended for industrial serial painting and professional yacht finishing.
- Optimised for manual application: Supports smooth flow and leveling when combined with R5015 ALEXSEAL Topcoat Reducer Brush and, if required, A5018 Roll Additive.
- Controlled drying and pot life: Cures within the standard ALEXSEAL Premium Topcoat 501 system parameters, with the option to accelerate using A5035 Topcoat Accelerator.
- Standardised safety and transport classification: Classified as a flammable liquid (UN 1263, paint related material) with harmonised transport data for road, sea and air.
Key specifications
- Chemical nature: Hardener based on polyisocyanates.
- Intended system: ALEXSEAL Premium Topcoat 501 (brush/roll application).
- Use type: Industrial serial painting; professional use only.
- Physical state: Liquid (20–25 °C, 1,013 hPa).
- Colour: According to product name.
- Odour: Characteristic.
- Boiling point: Approx. 120 °C.
- Flash point: 25 °C (ISO 13736).
- Auto-ignition temperature: > 400 °C.
- Explosion limits: 1.0–10.0 % (V).
- Density: 1.09 g/cm³.
- Water solubility: Insoluble; immiscible with water.
- VOC content (as supplied): 25 %, 270 g/l.
- Packaging (typical): 1 pint & ½ gallon.
Technical application data
Mixing ratio for brush and roll application
- Base: 2 parts by volume ALEXSEAL Premium Topcoat 501 (Base Color).
- Converter: 1 part by volume C5012 TOPCOAT 501 Converter Brush.
- Reducer: 16–33 % by volume R5015 ALEXSEAL Topcoat Reducer Brush.
- Typical example: 2 : 1 : 1 = 33 % reduction.
- The exact amount of reducer may be adjusted depending on application conditions.
Use with additives
- A5018 ALEXSEAL 501 Topcoat Roll Additive:
- Used to minimise the need for tipping off with a brush when rolling.
- Helps bubbles escape before the paint film tacks up.
- Maximum dosage: 1 cap or 10 ml (1/3 oz) per mixed 1 quart (1 litre) of catalysed and reduced Premium Topcoat 501.
- Allow a 15-minute induction period after adding A5018 before adding reducer.
- A5035 ALEXSEAL Topcoat 501 Accelerator:
- Used to reduce drying time of ALEXSEAL Premium Topcoat 501.
- Maximum dosage: 1 cap or 10 ml (1/3 oz) per mixed 2 quarts (2 litres) of catalysed and reduced Premium Topcoat 501.
- Higher quantities reduce pot life and are not recommended.
System pot life and drying (Topcoat 501 system)
Optimal application environment: 15–30 °C (60–85 °F), 40–80 % RH.
- Approximate pot life (without accelerator): 4–6 hours depending on temperature.
- Dust free: 30–90 minutes depending on temperature.
- Tape dry (without accelerator): 18–36 hours depending on temperature.
- Full cure (without accelerator): 10–21 days depending on temperature.
- Spray/brush/roll recoat with Premium Topcoat 501: after tack-up, typically from 45–90 minutes (spray) or 6–12 hours (brush/roll), within the specified maximum times.
Actual times are influenced by surface temperature, air flow, sunlight, reducer choice and film thickness.
Applications and use cases
- Yacht and marine topcoats: Converter component for ALEXSEAL Premium Topcoat 501 on superstructures, hulls and decks applied by brush or roller.
- Interior and exterior areas: Suitable in areas not subject to permanent water immersion when used within the Topcoat 501 system.
- Maintenance and refit work: Ideal for repair, touch-up and small-area refinishing where spraying is impractical and brush/roll application is preferred.
- Industrial serial painting: Designed for controlled, repeatable processes in professional coating lines.
FAQ
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What is the correct mixing ratio for ALEXSEAL TOPCOAT 501 Converter Brush?
Mix 2 parts by volume ALEXSEAL Premium Topcoat 501 (Base Color) with 1 part by volume C5012 Converter Brush. Then add 16–33 % by volume R5015 Topcoat Reducer Brush, depending on conditions.
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Can this converter be used for spray applications?
No. Spray applications of Premium Topcoat 501 use C5051 ALEXSEAL Topcoat Converter Spray. C5012 is specifically formulated for brush and roller use.
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Is ALEXSEAL C5012 suitable for non-professional or DIY use?
No. The product and the Premium Topcoat 501 system are specified for industrial serial painting and professional use only.
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How flammable is the product?
C5012 is classified as a flammable liquid, Category 3, with a flash point of 25 °C. Keep away from heat, sparks, open flames and other ignition sources and follow all labelling and safety instructions.
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What happens if too much accelerator A5035 is added?
Adding more than 10 ml (1/3 oz) per 2 litres of mixed Topcoat 501 reduces pot life significantly and is not recommended.
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Does the converter have VOC content?
Yes. The VOC content is 25 %, equivalent to 270 g/l as supplied.
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Can I reseal and reuse opened containers?
Yes, provided they are carefully resealed, kept upright to prevent leakage and stored under the recommended conditions (5–35 °C, dry, well-ventilated, away from moisture and ignition sources).
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Is any special training required to use this product?
Yes. From 24 August 2023, adequate training is required before industrial or professional use, as stated in the product labelling.
Section 14 – Transport information
- UN number: UN 1263.
- UN proper shipping name: PAINT RELATED MATERIAL.
- Transport hazard class: Class 3 (flammable liquids).
- Packing group: III.
- ADR:
- Classification code: F1.
- Hazard identification number: 30.
- Tunnel restriction code: (D/E).
- Environmentally hazardous: no.
- Label: 3.
- IMDG:
- Marine pollutant: no.
- EmS code: F-E, S-E.
- Label: 3.
- IATA (air transport):
- Packing instruction (cargo aircraft): 366; Packing group III; Label: Flammable Liquids.
- Packing instruction (passenger aircraft): 355; LQ packing instruction Y344; Packing group III; Label: Flammable Liquids.
- On-site transport advice: Within the user’s premises, always transport in closed, upright and secure containers. Ensure personnel know the procedures in case of incident or spillage.
Section 8 – Individual protection measures
Engineering controls
- Provide adequate ventilation using local exhaust and good general extraction.
- If ventilation is insufficient to keep concentrations below occupational exposure limits, suitable respiratory protection must be worn.
Personal protective equipment (PPE)
- Eye/face protection: Wear safety goggles to protect against solvent splashes.
- Hand protection:
- Use chemical-resistant protective gloves compliant with EN 374.
- Recommended for splash contact: nitrile rubber or neoprene.
- Minimum thickness: > 0.4 mm; breakthrough time: > 480 min (under test conditions).
- Check suitability for the specific workplace and replace gloves immediately if damaged or worn.
- Skin and body protection:
- Wear antistatic protective clothing made of natural fibres (e.g. cotton) or heat-resistant synthetic fibres.
- Clean contaminated skin areas thoroughly after contact.
- Respiratory protection:
- For spraying operations within the system: use an air-fed respirator.
- For other operations in well-ventilated areas: a combination charcoal and particulate filter mask (e.g. half-mask with appropriate cartridge) may be used.
- General protective measures:
- Persons with asthma, allergies or chronic/recurrent respiratory disease should not work with this preparation.
- Do not eat, drink or smoke during use.
- Avoid contact with skin, eyes and clothing and avoid inhalation of vapours, spray mist and sanding dust.
*Contenido generado por IA
