Extreme Paints Barn & Shed Paint for Durable PU Oil Finish 20.0 kg

Extreme Paints Barn and Shed Paint is a high-performance, oil-based polyurethane exterior coating engineered for farm buildings, outbuildings, metal cladding and timber sheds. Formulated to combine the durable protection of solvent systems with improved handling characteristics, this PU finish gives a weatherproof, flexible film that moves with wood expansion while locking out moisture, rust and chalking. 

It dries quickly to a smooth satin oxide gloss with low odour compared with older solvent enamels, and cleans up easily with white spirit.

This formula is designed for practical, long-lasting protection where aesthetics and durability matter. The modified PU resin resists abrasion, jet-wash cleaning, oil and grease, making it ideal for agricultural doors, corrugated steel panels, galvanised sheds and timber cladding. The paint self-levels to a uniform finish that retains colour and sheen even after repeated exposure to sun, rain and seasonal movement.

Key features

• Fast drying, low odour oil-based PU formula for exterior use.

• Flexible but tough satin oxide gloss that resists flaking and chalking.

• Good adhesion to timber, galvanised and primed metals, aluminium and masonry.

• Easy maintenance and jet-wash cleanable once fully cured.

• Available in a broad workshop palette, with custom BS or RAL tints on large orders.

Suitable substrates

Suitable for softwood, hardwood and plywood, galvanised steel (abraded), primed metal and aluminium, concrete panels and cement board, brickwork and rendered masonry. Bare steel should be spot-primed with an anti-corrosive oxide primer prior to topcoat.

Colours available

Light Grey, Mid Grey, Dark Grey, Mid Green, Dark Green, Blue, Yellow, Red, Black, White, Orange. Custom BS4800 or RAL shades available on orders over 100 L for fleet or large scale projects.

Coverage and finish

Typical spread rate is 6–8 m² per litre per coat on smooth prepared surfaces. The paint delivers a smooth satin oxide gloss; two coats are recommended for best durability and uniform colour. Apply thin, even coats and avoid over application to reduce risk of runs.

Drying and recoat times (at 18 °C)

• Touch dry: 2–4 hours.

• Recoat window: 2–4 hours.

• Full cure and weather resistance: 7 days. Times will extend in cool or damp conditions.

Storage and clean up

Store sealed between 5 °C and 30 °C, away from frost and ignition sources. Clean brushes and equipment with white spirit while paint is still wet. Order your total project volume in one batch to ensure consistent colour across the job.

Safety and handling

This is a solvent-based, flammable coating. Use only in well-ventilated areas, keep away from sparks and open flames, and wear appropriate PPE including gloves and eye protection. Keep out of reach of children and follow local disposal regulations for leftover product and containers. For full safety information consult the product Safety Data Sheet.

Recommended uses

Barn doors and cladding, galvanised metal sheds, wooden and concrete farm buildings, corrugated steel panels, and commercial outbuildings where a durable, low maintenance finish is required.