All of the advantages of the original Zinga in an easy-to-use spray can, for repairing or touching up galvanising, damaged or old hot-dipped, other zinc coated structures or products previously treated with Zinga. This 500ml aerosol spray dries at approx. 20-25 microns, requiring a minimum of 2 coats.

The Zinga film galvanising system contains 96% Zinc in the dry film and provides cathodic protection to ferrous metals.

Uses

Repair For Worn or Damaged Hot-Dip Galvanising or Hot Metal Spray

A common use for Zinga with the simplist surface preparation; Zinga's mechanism of protection is so similar to conventional galvanising that they work in complete unison, as they are merely different forms of zinc. Rather than replace galvanised assets, structures can simple have their protection “re-charged” by applying Zinga to the rough surface of the old galvanising after appropriate decontamination.

Stand Alone System

Zinga provides comparable protection to conventional galvanising without the need for topcoats. The grey colour can be re-coated at any point in the future with the bare minimum of preparation and without compromising the integrity of the coating. Zinga on its own is often used when specifiers are unable to galvanise because the structure is already in situ or too big for the molten zinc baths. Additionally Zinga is commonly specified on delicate structures (wrought iron gates, sculptures) or when architectural demands require a higher standard of surface finish (no need to drill to de-gas, fettle).

As A Primer With Suitable Topcoats

With the additional protection of a compatible topcoat the coating durability offered is significantly increased. Zinga does not even have to start actively working until the topcoat has been compromised and with no underlying corrosion creep or rust bubbling the topcoat itself inevitably lasts longer.

As Protection To Concrete Reinforcement Bars (Rebars)

Widely used in countries where the available aggregate for concrete can be saline (e.g. Iran , India, Saudi Arabia), Zinganising the steel re-bars before assembly and immersion in concrete ensures vastly increased protection from corrosion without reducing the pull-out strength of the bars.

Surface Preparation

Zingaspray can be applied on ferro-metals and damaged zinc surfaces.

For optimal performance, the metal should first be degreased, preferably by steam-cleaning. Alternatively, the surface can be degreased using solvent (e.g. Zingasolv), but never use white spirit.

For optimal performance, clean to SA 2,5 (ISO 8501:2007). For non-critical (small) areas, cleaning to St 3 is sufficient.

Roughness

Zingaspray should be applied on a metal substrate that has a roughness grade of fine to medium G (Rz 50 to 70 µm) according to the standard ISO 8503-2:2012.

This can be obtained by grit-blasting (with sharp particles) but not by shot-blasting (with spherical particles). Make sure that the surface is degreased before the grit-blasting.

This high degree of roughness is not needed when Zingaspray is applied on a hot-dip galvanisation or a metallisation layer, or when it is applied on top of an existing ZINGA layer. Make sure Zinc salts are removed from the surface to ensure a good electrochemical connection between the two layers. Old hot-dipped surfaces have adequate roughness, new hot-dipped surfaces require a sweep blast.

For small, non-critical areas, roughness can be obtained by using a steel wire brush.

Maximum time to application

Apply the ZINGA as soon as possible on the prepared metal substrate (max. 4 hours waiting time). If contamination occurs before coating, the surface must be cleaned again as described above.

Application

Shake thoroughly before use - vigorously for at least 30 seconds, repeating everytime the can is left unused for some time.

Keep the spray between 10 and 20 cm away from the substrate and move in a continuous speed from left to right. Repeat with a spray application from top to bottom.

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.

Overcoating With A Compatible Paint

ZINGA can be overcoated with a wide range of compatible paints. It is however, just like all Zinc rich systems sensitive to influence of solvents. In order to avoid blistering, pinholes and other defects (which will negatively affect the performance of the ZINGA layer), it is advised to apply any topcoat with a mist/full coat technique. First, a thin continuous layer is applied which gives air bubbles easy passage through the film. The first mist coat also provides a barrier for aggressive solvents in the topcoat.

Mist coat:

• Application at least 6 hours after ZINGA is touch-dry.
• 25 to 30 μm DFT (continuous layer).
• Normal dilution according to the technical data sheet of topcoat.

Full coat:

• Application at least 2 hours after the mist coat is touch-dry.
• Specified layer thickness minus 25 to 30 μm DFT (of mist coat).
• Normal dilution according to the technical data sheet.

To avoid any problems with application of topcoats, it is advised to use a sealer; two compatible sealers which have been tested according ISO 12944: Zingalufer (PU sealer) and Zingaceram HS (EP sealer).

Coverage and Consumption

Drying Time

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

• Touch dry: 15 minutes
• Dry to handle: 1 hour
• Fully cured: 48 hours

Overcoating

With a new layer of ZINGA

• Always apply 2 layers, apply the second coat 1 hour after touch dry.
• Maximum overcoat time depends on environmental conditions. If zinc salts have formed, they should first be removed.