Alu ZM, a quick-drying one-pack coating for use as an aluminium topcoat on Zinga or applied directly onto old, uncorroded hot-dip galvanised or thermal sprayed zinc substrates by brush or spray.

Based on aluminium flakes, Alu ZM is mainly applied for aesthetical reasons with its shiny aluminium aspect, but good chemical and abrasion resistance allows it to be used in industrial environments.

Features

• One pack system
• Topcoat for Zinga
• Apply by brush or sprayer
• Not to be applied by a roller
• Touch dry in 25 minutes, full cured in 24 hours

Application

For more specific and detailed recommendations concerning application, please contact our technical team on 0113 2455450. For detailed information about the health and safety hazards and precautions for use, refer to the safety data sheet in the attachments tab above.

By Brush - Alu ZM should not be applied by roller.

Dilution: Alu ZM is ready for use when applied by brush. For best results, dilute 3 to 5%.

First layer: Wait until Zinga is sufficiently dry before application of first layer by brush (4 hours after touch dry).

By Conventional Spray-Gun

Dilution: 10-20% (mass on mass) with Zingasolv depending on nozzle size. More dilution for same nozzle size will give a smoother surface finish.

Pressure at the nozzle: 2 to 4 bar

Nozzle opening: 1.4 to 1.8 mm

By Airless Spraying

Dilution: 5-10% (mass on mass) with Zingasolv depending on nozzle size. More dilution for same nozzle size will give a smoother surface finish.

Pressure at the nozzle: ± 150 bar

Nozzle opening: 0.017 - 0.031 inch; 0.015-0.025 inch for a smoother finish.

Coverage

Theoretical Consumption

• For 40 μm DFT: 8,50 m²/L
• For 60 μm DFT: 5,67 m²/L

Theoretical Coverage

• For 40 μm DFT: 0,12 L/m²
• For 60 μm DFT: 0,18 L/m²

Drying

Alu ZM dries by evaporation of the solvent. The drying process is influenced by the total WFT, the number of coats applied, the ambient air (humidity and temperature) and the steel surface temperatures.

Drying time For 40 μm DFT at 20°C in a well-ventilated environment:

• Touch dry: 25 minutes
• Dry to handle: 1.5 hours
• Fully cured: 24 hours

Overcoating

With a new layer of Alu ZM:

• 1 hour after touch dry with spray. 4 hours after touch dry by brush.
• Any intermediate coat contamination that could disturb the adherence of the next coat should be removed by appropriate cleaning.

Reliquidisation

Each new layer of Alu ZM reliquidises the former Alu ZM layer so that both layers form one homogeneous layer.