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Altex Epoxy Barrier Undercoat 5L

Cat.No:  64611N
  • Dangerous Item

Availability: In stock

our price $189.90
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Altex Yacht & Boat Paint Epoxy Barrier Undercoat is a high performance, sandable epoxy high build coating which is both very corrosion and water resistant.

Epoxy Barrier Undercoat is recommended for:

  • Topside & Superstructure final sealing to provide an optimum surface for finish coating.
  • As a high build surfacer to remove defects and achieve a finish suitable for application of Altex Polyurethane Undercoat or one of the Elite Polyurethane finish coats.
  • As a high build barrier coat for below waterline application, used as part of an Altex Antifouling system.
  • Direct application to sanded GRP, epoxy laminated wood and epoxy sealed wood.
  • Direct application to epoxy faired surfaces.
  • Application over Altex Epoxy Primer or Altex High Build Surfacer.
  • Priming / undercoating over degreased & sanded aged polyurethanes, epoxies, fairing systems, gelcoats, epoxy laminates & fibreglass.


  • Excellent build properties up to 150µm DFT in a two pass application.
  • Excellent surfacing and sanding properties.
  • Very good corrosion protection.
  • Wide maximum self re-coat times for easy project management.
  • Very good water and chemical resistance.
  • Epoxy Barrier Undercoat may be top-coated with both acrylic or polyester urethane finishes and is especially formulated as an undercoat or sealer under the Altex Elite® range of polyurethane finish coats.
  • May be used as a high build surfacer / undercoat for topcoating with Altex Polyurethane Undercoat.
  • May be used in immersion service as part of an Altex Yacht & Boat recommended system.


  • Coating Type: Phenalkamide Epoxy
  • Colour: Off-White
  • Size: 5L
  • Mix Ratio: 4 to 1 by volume
  • Gloss: Low Sheen
  • Thinner: Spray: Altex Thinning Solvent #12
  • Brush/Roller: Altex Thinning Solvent #22

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