What is ALEXSEAL SUPER FAIR 212 THICK BASE and why choose it
ALEXSEAL Super Fair 212 Thick Base is a solvent-free, epoxy-based, light-weight fairing filler designed for professional yacht building and repair. It offers excellent application, sanding and anti-sagging properties, making it suitable for building up thicker fairing layers on properly prepared substrates. Once cured, it provides a high-quality surface ready for recoating with other ALEXSEAL Yacht Coating products.
Main features
- Solvent-free epoxy filler with 100% volume solids when catalyzed.
- Light-weight fairing compound ideal for filling and fairing yacht surfaces.
- For above and below the waterline; when used below the waterline it must be sealed with ALEXSEAL Finish Primer 442.
- Excellent application characteristics with very good anti-sagging and sanding properties.
- Easy mixing control thanks to differently colored components that form a homogeneous color when properly mixed.
- Compatible with ALEXSEAL primers and build coats such as Protective Primer 161, Super Build 302 and Finish Primer 442.
- Professional use only, designed for industrial serial painting and yacht coating applications.
Technical specifications
Product identification
- Brand: ALEXSEAL
- Commercial name: Super Fair 212 Thick Base
- Trade name / Code: P2123 ALEXSEAL Super Fair 212 Thick Base
- Formulation type: Mixture of synthetic resins and pigments
- Physical state: Liquid
- Finish: Matt
- Color of mixture (with converter): Gray
- Thick Base color (unmixed): Light green
- Standard Converter color: Light gray
- Fast Converter color: Red
Mixing and reduction
- Compatible converters:
- C2127 ALEXSEAL Super Fair 212 Standard Converter
- C2128 ALEXSEAL Super Fair 212 Fast Converter
- Mixing ratio by volume: 1 : 1 (Base : Converter)
- Mixing ratio by weight: 1 : 1 (Base : Converter)
- Reduction: Must not be reduced; solvent-free system.
Chemical and physical data (Thick Base)
- Boiling point: approx. 120 °C
- Flash point: 101 °C (ISO 13736)
- pH (10% solution, 20 °C): 6 – 8
- Water solubility: Insoluble
- Vapour pressure (50 °C): approx. 100 hPa
- Density (20 °C): approx. 0.8 g/cm³
- Miscibility with water: Immiscible
- Solvent separation: < 3% (V)
Coverage and film build (mixed system)
- Volume solids (catalyzed, without reduction): 100%
Coverage depends on required filling depth and surface size. The following values are based on combined base and converter:
- Theoretical coverage: 1 m²/L (3.8 m²/gal; 41 sq. ft./gal) at 1 mm (approximately 1/25") dry film thickness.
- Practical coverage at average thickness:
- Approx. 0.15 m²/L (0.6 m²/gal; 6.4 sq. ft./gal) at 6 mm (1/4").
- Approx. 0.11 m²/L (0.44 m²/gal; 4.8 sq. ft./gal) at 8 mm (3/8").
- Approx. 0.07 m²/L (0.29 m²/gal; 3.2 sq. ft./gal) at 10 mm (1/2").
Recommended application conditions
- Optimal ambient range for application: 15 – 30 °C (60 – 85 °F), 40 – 80% relative humidity.
- Use Fast Converter: Below 15 °C / 60 °F.
- Do not use: Below 10 °C / 50 °F or above 40 °C / 104 °F.
Pot life and drying (mixed product)
Values refer to the mixed system Super Fair 212 with the respective converters.
With C2127 Standard Converter
- Pot life:
- 15 °C (60 °F): 1 hour
- 20 °C (68 °F): 50 minutes
- 25 °C (77 °F): 40 minutes
- 30 °C (85 °F): 30 minutes
- Dry to sand:
- 15 °C (60 °F): 36 hours
- 20 °C (68 °F): 24 hours
- 25 °C (77 °F): 18 hours
- 30 °C (85 °F): 12 hours
With C2128 Fast Converter
- Pot life:
- 15 °C (60 °F): 45 minutes
- 20 °C (68 °F): 35 minutes
- 25 °C (77 °F): 25 minutes
- 30 °C (85 °F): 15 minutes
- Dry to sand:
- 15 °C (60 °F): 15 hours
- 20 °C (68 °F): 10 hours
- 25 °C (77 °F): 8 hours
- 30 °C (85 °F): 4 hours
The given values are approximate minimum and maximum times. Surface temperature, air flow, sunlight (direct or indirect) and film thickness will affect actual curing and recoating times.
Applications and use cases
Typical substrates
- Metal substrates
- For optimum mechanical strength and corrosion resistance, prepare the surface correctly and prime with ALEXSEAL Protective Primer 161.
- Super Fair 212 may be applied directly to ALEXSEAL Protective Primer 161 without sanding for up to 6 months.
- GRP substrates
- Use ALEXSEAL Super Build 302, Finish Primer 442 or Protective Primer 161 over a properly prepared GRP surface.
- All ALEXSEAL Primers (except 161, see 161 overcoat information) should be sanded with P60–P80 after overnight dry before applying Super Fair 212.
- Other substrates including epoxy resins: Contact your ALEXSEAL representative for specific recommendations.
Surface preparation
- Substrate must be clean, dry and free from dust, grease, oil and other contamination.
- For optimum adhesion, grind and/or blast the substrate with 36–60 grit before priming.
- Full fairing systems require a heavily abraded substrate.
- Thin fairing systems < 3 mm (approx. 1/8–0.012 inch) require a less aggressive profile.
Application method
- Recommended tools: Trowels, spatulas, straight-edge materials.
- Components have different colors to visually control mixing; the mixed filler must be a completely homogeneous color.
- Mix mechanically with slow-turning dough mixers or manually. Do not use drill mixers.
- Avoid introducing air bubbles during mixing.
- Apply in thin layers with a spatula or trowel, working up to the desired thickness; pull off excess with a straight edge to avoid air pockets.
- Tool cleaning: Use R4042 ALEXSEAL Epoxy Primer Reducer.
Sanding and overcoating
- Block sand ALEXSEAL Super Fair 212 with P36–P120 grit.
- Finishing with P80 grit or finer helps prevent sand scratch print-through in the final system.
- Recoating Super Fair 212 over itself should follow minimum dry-to-sand times; scratch sand with P36–P60 for good intercoat adhesion.
- Overcoating with other ALEXSEAL products (302, 303, 328, 442) can be done after the minimum time and after block sanding with P36–P120 grit.
FAQ – ALEXSEAL Super Fair 212 Thick Base
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Can Super Fair 212 Thick Base be used below the waterline?
Yes. It can be used above and below the waterline, but when used below the waterline it must be sealed with ALEXSEAL Finish Primer 442.
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What is the correct mixing ratio for Super Fair 212 Thick Base?
The mixing ratio is 1:1 by volume and 1:1 by weight between the base and the appropriate converter (C2127 Standard or C2128 Fast Converter). The product must not be reduced.
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Which tools should I use to apply this filler?
Use trowels, spatulas or straight-edge materials. Drill mixers are not recommended for mixing the components.
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How do I know if the product is mixed properly?
The base and converter have different colors to help control the process. After thorough mixing, the filler should show a completely homogeneous gray color.
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What sanding grit is recommended before overcoating?
Block sand Super Fair 212 with P36–P120 grit. Finishing with P80 grit or finer is recommended to minimize sand scratch marks in the final finish.
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What environmental conditions are recommended during application?
The optimal range is 15–30 °C (60–85 °F) and 40–80% relative humidity. Use the Fast Converter below 15 °C and do not apply below 10 °C or above 40 °C.
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How should equipment be cleaned after use?
Clean application tools with R4042 ALEXSEAL Epoxy Primer Reducer.
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Which primers are compatible on metal substrates?
ALEXSEAL Protective Primer 161 is recommended. Super Fair 212 may be applied directly to this primer without sanding for up to six months.
Section 14 – Transport information
The following data refer to the transport classification of ALEXSEAL P2123 Super Fair 212 Thick Base as supplied.
- UN number / ID number: UN 3082
- Proper shipping name (ADR/IMDG/IATA): Environmentally hazardous substance, liquid, n.o.s. (reaction product: bisphenol-A-(epichlorhydrin) and epoxy resin (number average molecular weight ≤ 700), REACTION PRODUCT: BISPHENOLF-(EPICHLORHYDRIN), EPOXY RESIN)
- Transport hazard class: Class 9 (miscellaneous dangerous substances and articles)
- Packing group: III
- ADR classification code: M6
- ADR hazard identification number: 90
- Labels: 9 (miscellaneous)
- IMDG EmS code: F-A, S-F
- Environmental hazard: Classified as environmentally hazardous for ADR and IATA; marine pollutant under IMDG.
- Maritime transport in bulk according to IMO instruments: Not applicable for product as supplied.
Transport classifications are based on the properties of the unpackaged material and may vary with mode of transport, packaging size and regional regulations.
Section 8 – Individual protection measures
The following personal protective measures are derived from the Safety Data Sheet for ALEXSEAL P2123 Super Fair 212 Thick Base and apply during handling and application.
Engineering controls
- Provide adequate ventilation through local exhaust and general extraction.
- Avoid inhalation of vapours, sanding dust, particulates and spray mist generated during application or sanding.
Personal protective equipment (PPE)
- Eye and face protection: Wear safety goggles to protect against splashes.
- Hand protection:
- Use chemical-resistant protective gloves tested in accordance with EN 374.
- Recommended materials for short-term contact (splash protection): nitrile rubber or neoprene.
- Recommended minimum thickness: > 0.4 mm.
- Breakthrough time: > 480 minutes.
- Gloves should be checked for workplace suitability and replaced immediately if damaged or worn.
- Skin and body protection: Wear work clothing as commonly used in the chemical industry; wash skin after contact. Preventive skin protection cream is recommended.
- Respiratory protection: Normally not required with adequate ventilation, but vapour inhalation should be avoided.
General protective and hygiene measures
- Do not eat, drink or smoke while using the product.
- Avoid contact with skin, eyes and clothing.
- Wash contaminated skin immediately.
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