Altex Epoxy Barrier Undercoat (2-Pack) – 1.25L

The Altex Epoxy Barrier Undercoat (2-Pack) 1.25L is a high-performance, sandable epoxy high-build coating designed to provide exceptional corrosion protection, water resistance, and surface sealing for marine applications. Formulated using advanced epoxy technology, it creates a durable barrier layer that protects hulls and structures while providing an ideal foundation for finishing systems.

This versatile epoxy undercoat can be used above and below the waterline as part of a complete marine coating system. It functions as a high-build surfacer, final sealing coat, or underwater barrier coat beneath antifouling, helping eliminate imperfections and produce a smooth, professional finish ready for topcoating.

Suitable for both professional and DIY marine painters, the Altex Epoxy Barrier Undercoat delivers excellent sanding properties, long pot life, and dependable performance in harsh marine environments. Key Features

High-performance two-pack epoxy barrier undercoat

Excellent corrosion and water resistance

High-build coating to smooth and seal surfaces

Suitable for above and below waterline use

Ideal as a barrier coat beneath antifouling systems

Excellent sanding and surfacing properties

Long pot life and wide recoat window

Compatible with polyurethane and acrylic finish systems

Suitable for GRP, epoxy laminated wood, and prepared coatings Technical Specifications

Product Type: Two-component epoxy high-build barrier undercoat

Pack Size: 1.25L kit (Part A Part B)

Mix Ratio: 4:1 by volume

Coverage: Approx. 4.5 m² per litre @ 100µm DFT

Finish: Low sheen

Pot Life: Approx. 8 hours @ 25°C

Application: Brush, roller, or spray

Colour: Off-white

Use: Marine barrier coat, surfacer, and undercoat