What ALEXSEAL DECKFILLER 252 BASE is and why choose it
ALEXSEAL Deckfiller 252 Base is a solvent-free, epoxy-based, lightweight filler developed specifically for professional fairing of yacht decks. Used together with the C2527 Converter in a 1:1 mixing ratio, it creates a stable, easy-to-sand fairing compound that provides a reliable foundation for subsequent teak deck systems on primed steel or aluminium decks.
Thanks to its excellent mixing, application and sanding properties, Deckfiller 252 helps achieve smooth, even deck surfaces while minimizing weight and ensuring long-term adhesion within the ALEXSEAL system.
Main features
- Solvent-free epoxy formulation for low VOC content and reduced solvent emissions.
- Lightweight filler with a cured density of approx. 0.5 g/cm³, ideal where weight savings are critical on yachts.
- Designed for teak deck systems as a fairing compound prior to installing the final teak decking.
- Excellent workability – easy to mix, spread and sand to a smooth, even surface.
- Reliable base for yacht decks – cured film forms a stable substrate for final deck coverings.
- Color-contrasted components (light blue base, brown converter) to visually control homogeneous mixing.
- High solids content – 100% volume solids when catalyzed without reduction.
- Part of a system – optimized for use over ALEXSEAL Protective Primer 161 and cleaned with R4042 ALEXSEAL Epoxy Primer Reducer.
Technical specifications
Product type and composition
- Type: Solvent-free, epoxy-based lightweight filler (used with Converter C2527).
- Physical state: Solid at 20 – 25 °C.
- Chemical nature: Mixture of synthetic resins and pigments.
Color
- Color of mixed product (base + converter): Light brown.
- Base (P2520 Deckfiller 252 Base): Light blue.
- Converter (C2527 Deckfiller 252 Converter): Brown.
Coverage and density
- Volume solids (catalyzed, unreduced): 100%.
- Density of cured material: approx. 0.5 g/cm³.
Theoretical coverage
- 1 mm dry film thickness (1/25"): approx. 1 m²/liter · 3.8 m²/gal · 41 sq. ft./gal.
Practical coverage at average thickness
- 6 mm (1/4"): approx. 0.15 m²/liter · 0.6 m²/gal · 6.4 sq. ft./gal.
- 8 mm (3/8"): approx. 0.11 m²/liter · 0.44 m²/gal · 4.8 sq. ft./gal.
- 10 mm (1/2"): approx. 0.07 m²/liter · 0.29 m²/gal · 3.2 sq. ft./gal.
Note: Coverage rates are calculated for the combined base and converter. Actual coverage will vary according to substrate profile, application method and fairing thickness.
Mixing and packaging
- Trade name (base): P2520 ALEXSEAL Deckfiller 252 Base 2 Gal.
- Trade name (converter): C2527 ALEXSEAL Deckfiller 252 Converter 2 Gal.
- Mixing ratio (by volume): 1:1 (Base : Converter).
- Mixing ratio (by weight): 1:1 (Base : Converter).
- Reduction: ALEXSEAL Deckfiller 252 must not be reduced.
Application parameters
- Recommended application tools: Trowels, spatulas, straight-edge materials.
- Maximum layer thickness per application: Up to 10 mm.
- Optimal application environment: 15–30 °C (60–85 °F), 40–80% relative humidity.
- Minimum during drying: 15 °C (60 °F); ideal temperature approx. 25 °C (77 °F).
- Dew point condition: Minimum 3 °C (5.4 °F) above dew point.
Pot life and drying (with C2527 Converter)
| Substrate temperature |
Pot life |
Dry to sand (min.) |
| 15 °C (60 °F) |
1 h |
36 h |
| 20 °C (68 °F) |
40 min |
20 h |
| 25 °C (77 °F) |
30 min |
18 h |
| 30 °C (85 °F) |
20 min |
12 h |
The values above are approximate minimum times. Surface temperature, airflow, sunlight exposure and applied film thickness will influence actual pot life and drying behavior.
Physical and chemical data (base product)
- Appearance: Light blue solid.
- Odor: Characteristic.
- Boiling point: approx. 120 °C.
- Flash point: 101 °C (ISO 13736).
- pH (10% solution, 20 °C): 6–8.
- Kinematic viscosity: > 21 mm²/s.
- Flow time: > 151 s (DIN 53211, 4 mm); > 101 s (ISO 2431, 6 mm).
- Water solubility: Insoluble; immiscible with water.
- Vapor pressure: approx. 100 hPa at 50 °C.
- Density: approx. 0.55 g/cm³ at 20 °C.
- VOC content: approx. 0.38 %, 2 g/l.
Applications and use cases
Intended use
- Fairing of primed steel or aluminium decks on yachts and other vessels prior to installation of teak deck systems.
- Application in industrial serial painting environments where high-performance marine coatings are required.
Substrate preparation
- Substrate must be clean, dry and free from dust, oil, grease and other contamination.
- For optimum adhesion, grind and/or blast the substrate with 36–60 grit abrasive before priming.
- Prime metal and GRP substrates with ALEXSEAL Protective Primer 161 to achieve optimum mechanical strength and corrosion resistance.
- Deckfiller 252 may be applied directly onto ALEXSEAL Protective Primer 161 without sanding for up to 6 months.
Application process (summary)
- Mix Deckfiller 252 Base and C2527 Converter at 1:1 by volume or weight until a uniform light-brown color is achieved.
- Apply with trowel or spatula in layers up to 10 mm, building up to the required thickness while avoiding inclusion of air pockets.
- Pull off excess material with a straight edge to achieve the desired fairing level.
- Allow to dry, then sand to a smooth, even surface. For recoating Deckfiller 252 over itself, observe minimum “dry to sand” times and scratch sand with 36–60 grit to ensure intercoat adhesion.
- Seal the faired and sanded surface with Protective Primer 161 before bonding the final teak deck.
- Clean application tools and equipment with R4042 ALEXSEAL Epoxy Primer Reducer.
FAQ – ALEXSEAL DECKFILLER 252 BASE
1. What is ALEXSEAL Deckfiller 252 Base used for?
It is the base component of a solvent-free epoxy fairing compound for levelling and fairing primed steel or aluminium decks before applying teak deck systems on yachts.
2. Which converter should I use with Deckfiller 252 Base?
Use C2527 ALEXSEAL Deckfiller 252 Converter. The base and converter are mixed 1:1 by volume or weight.
3. Can Deckfiller 252 be thinned or reduced?
No. ALEXSEAL Deckfiller 252 must not be reduced. It is designed to be applied without solvent addition.
4. What surface preparation is required before application?
The deck must be clean, dry and free of contaminants, then ground or blasted with 36–60 grit. Prime with ALEXSEAL Protective Primer 161 before applying Deckfiller 252.
5. How thick can I apply the filler in one pass?
Apply in layers up to 10 mm thickness, working to the desired build before removing excess with a straight edge.
6. When can I sand Deckfiller 252 after application?
Depending on temperature, minimum “dry to sand” times range from about 36 hours at 15 °C to about 12 hours at 30 °C.
7. What is the pot life after mixing base and converter?
Pot life varies from about 1 hour at 15 °C to about 20 minutes at 30 °C. Always mix only the amount that can be applied within this time.
8. Can Deckfiller 252 be applied over itself?
Yes. Follow the minimum dry-to-sand times and scratch sand with 36–60 grit before applying additional layers.
9. Do I need to seal the filler before bonding the teak deck?
Yes. After sanding to a smooth surface, seal with Protective Primer 161 before starting to glue the final decking.
10. How should tools be cleaned after use?
Use R4042 ALEXSEAL Epoxy Primer Reducer to clean application equipment.
Section 14 – Transport information
The following information is based on the Safety Data Sheet classification for ALEXSEAL P2520-Deckfiller 252:
- UN number / ID number: UN 3077.
- UN proper shipping name (ADR / IMDG / IATA): Environmentally hazardous substance, solid, n.o.s. (Paint).
- Transport hazard class: Class 9 (Miscellaneous dangerous substances and articles).
- Packing group: III.
- ADR classification code: M7.
- Hazard identification number (ADR): 90.
- Labels: Class 9 label (Miscellaneous Dangerous Goods).
- Tunnel restriction code (ADR): (-).
- IMDG EmS code: F-A, S-F.
- IATA packing instruction (cargo): 956; packing group III.
- IATA packing instruction (passenger): 956; limited quantity Y956; packing group III.
- Environmentally hazardous / marine pollutant: Yes (ADR, IMDG, IATA).
Transport classification can vary depending on packaging, mode of transport and regional regulations. Always follow the current transport rules and documentation for the specific shipment.
Section 8 – Individual protection measures
According to the Safety Data Sheet, ALEXSEAL P2520-Deckfiller 252 can cause skin irritation, serious eye irritation and may cause an allergic skin reaction. It is also toxic to aquatic life with long lasting effects. The following personal protection measures are recommended when handling the product:
Engineering controls
- Provide adequate ventilation using local exhaust and general extraction in the work area.
Eye and face protection
- Wear safety goggles suitable for protection against splashes.
Hand protection
- Use chemical-resistant protective gloves tested according to EN 374.
- For short-term contact (splash protection), suitable materials include nitrile rubber or neoprene with a minimum thickness of > 0.4 mm and breakthrough time > 480 minutes.
- Always check glove suitability for the specific workplace (mechanical resistance, product compatibility, antistatic properties) and follow the glove manufacturer’s instructions for use, storage, care and replacement.
- Replace gloves immediately when damaged or worn.
- Use preventive skin protection cream and wash contaminated skin promptly.
Skin and body protection
- Wear work clothing typical for the chemical industry.
- Wash skin after contact with the product.
Respiratory protection
- Normally not required under adequate ventilation; avoid breathing vapors and dust from sanding.
General hygiene measures
- Avoid contact with skin, eyes and clothing.
- Avoid inhalation of dust, particulates and spray mist arising during application and sanding.
- Do not eat, drink or smoke while working with the product.
Contenido generado por IA
