ROVAL RS, officially named ROVAL SILVER Zinc Rich Compound, is a single component zinc rich coating developed for repairing and renovating galvanized steel. Its dry film contains 83% zinc by weight and leaves a clean silver matte finish that blends naturally with galvanized surfaces.
ROVAL RS is primarily suitable for renovating properly prepared galvanized surfaces. It may also be used as a silver topcoat over ROVAL Cold Galvanizing Compound when a galvanized appearance is required.
ROVAL RS also serves customers looking for a bright silver ZRC coating or zinc rich paint for galvanized steel repair and visible touch up work in Pakistan. Marjan Polymer Industries is the exclusive and official ROVAL distributor in Pakistan. ROVAL RS is available for industrial maintenance, steel fabrication and project supply across Pakistan.
Purpose and Applications
- Repairing old or damaged galvanized steel after correct surface preparation
- Restoring weld seams, cut edges and drilled areas
- Coating bolts, nuts, brackets and other visible repair points
- Renovating railings, pipes, frames, supports, gates and fabricated assemblies
- Repairing damage caused during fabrication, transport or installation
- Providing a silver finish on properly prepared galvanized surfaces
- Carrying out site maintenance where steel cannot be returned to a galvanizing plant
ROVAL RS is not ordinary silver paint. Its zinc rich film can provide sacrificial galvanic protection when it has direct contact with a correctly prepared metallic surface and the required film thickness is achieved.
Technical Specifications
| Property | Manufacturer data |
|---|---|
| Official product name | ROVAL SILVER Zinc Rich Compound |
| Common grade reference | ROVAL RS |
| Pack size | 1.5 kg tin |
| Dry film colour | Silver |
| Dry film appearance | Matte |
| Zinc content in dry film | 83% ±1% by weight |
| Zinc purity used | 99.995% |
| Specific gravity | 1.77 kg/L ±0.10 |
| Recommended total dry film thickness | 80 μm, normally 40 μm × 2 coats |
| Direct application system | More than 80 μm total dry film thickness |
| Theoretical coverage at 80 μm | 2 m²/kg |
| Theoretical area per 1.5 kg tin | 3 m² |
| Touch dry and overcoating | Approximately 30 minutes at 20°C and 65% RH for a 40 μm coat |
| Full cure | 24 hours under the stated test conditions |
| Application temperature | 5°C to 40°C |
| Maximum relative humidity | Below 85% |
| Maximum metal surface temperature | Below 50°C |
| Heat resistance test | 170°C for 24 hours with no abnormality reported |
| Application methods | Brush, roller, conventional spray or airless spray |
| Manufacturer stated storage period | 3 years from manufacture when unopened and correctly stored |
Coverage is theoretical. The manufacturer advises allowing about 20% loss for brush application and 30% loss for spray application. Surface profile, shape, overspray, wastage and applicator technique will affect actual consumption.
How the Zinc Rich Film Protects Steel
Most conventional coatings protect steel mainly by forming a barrier. ROVAL RS also contains metallic zinc. When the coating is in direct contact with a clean metallic surface, the zinc can corrode preferentially and help protect exposed steel around scratches and local repair areas.
This protection depends on proper surface preparation, thorough mixing and sufficient dry film thickness. A silver colour alone does not prove galvanic performance. Do not apply ROVAL RS over oil, grease, salt, loose rust, mill scale, moisture or an unsound old coating.
Surface Preparation
Correct preparation is essential because the zinc in the coating needs suitable contact with the metal.
- Wash away salt and water soluble contamination.
- Remove oil and grease with a suitable solvent cleaning method.
- Remove dust, loose corrosion products and any unsound coating.
- Prepare the repair area to expose a clean and firm metallic surface.
- Make sure the surface is fully dry before coating.
- Mix the tin thoroughly with a power paint mixer before use and during longer application periods.
| Surface condition | Preparation guidance |
|---|---|
| Galvanized steel with red rust, old coating or welded areas | Power tool cleaning to ISO 8501-1 St 3 to expose a clean metallic surface |
| New galvanized steel affected by white rust | Hand tool cleaning to ISO 8501-1 St 2 after removing white rust deposits |
| Sound galvanized steel being renovated | Remove contamination and prepare the surface as required by the current ROVAL technical data and the project specification |
The governing project specification and inspection requirements take priority over general website guidance.
Mixing and Application
ROVAL RS is a single component product and does not require a separate hardener. Zinc can settle during storage, so mechanical mixing is important before application and should be repeated when needed to keep the coating uniform.
Dilution is normally unnecessary for brush or roller application. If thinning is required, use only the thinner and limit stated in the current manufacturer data. Spray nozzle size, pressure, filtration and thinning must also follow the current ROVAL Technical Data Sheet.
Apply even coats and check wet or dry film thickness where the work requires controlled corrosion protection. Allow the specified interval between coats. Protect the fresh coating from rain, dust and other contamination until it has cured.
Professional Use in Pakistan
ROVAL RS is suited to repair and maintenance work where galvanized steel is damaged during welding, drilling, cutting, transport, installation or service. Typical users in Pakistan include:
- Steel fabricators and galvanizing contractors
- Industrial maintenance departments
- Power, energy and utility projects
- Telecom and solar structure installers
- Pipe, tank and equipment fabricators
- Infrastructure and engineering contractors
- Workshops repairing galvanized railings, frames, brackets and supports
For coastal, marine or severe industrial exposure, selection should not be based on appearance alone. The corrosion category, surface preparation, total coating system, inspection method and required service life must be reviewed before work begins.
Appearance and Weathering
ROVAL RS provides a silver finish intended to blend with galvanized steel. The shade may change as the zinc film weathers and forms natural zinc corrosion products. The repaired area and the original galvanizing may weather at different rates depending on exposure, surface condition and film build.
This natural change in appearance is not, by itself, evidence of coating failure.
ISO 1461 Repair Coating Context
ROVAL states that ROVAL SILVER conforms to ISO 1461 in relation to its use as a repair coating for hot dip galvanizing. This does not mean every painted surface is structurally identical to factory applied hot dip galvanizing.
Project acceptance depends on the governing specification, permitted repair method, repair area, surface preparation, film thickness and inspection requirements.
Safety, Handling and Storage
ROVAL RS is a solvent containing industrial coating. Use it with adequate ventilation and suitable personal protective equipment. Keep it away from heat, sparks, flames and other ignition sources. Avoid breathing vapour or spray mist. Prevent skin and eye contact, and do not release the product into drains or the environment.
Keep the container tightly closed in a cool, well ventilated place protected from direct sunlight. Read the current ROVAL SILVER Safety Data Sheet before handling, spraying, storage or disposal. Refer to the current ROVAL SILVER Technical Data Sheet for application details.
Price, Stock and Nationwide Supply
The current ROVAL RS price and stock status are shown in the product information above. For project quantities, technical documents, stock confirmation or delivery planning, contact Marjan Polymer Industries before ordering.
Nationwide dispatch can be arranged across Pakistan, subject to stock, order quantity, transport coverage and safe handling requirements.
Frequently Asked Questions
What is ROVAL RS?
ROVAL RS is the common grade reference for ROVAL SILVER Zinc Rich Compound. It is a single component silver coating containing 83% zinc by weight in the dry film and is primarily intended for repairing properly prepared galvanized steel.
Is ROVAL RS ordinary silver paint?
No. Ordinary silver paint mainly provides colour and a barrier film. ROVAL RS contains metallic zinc and can provide sacrificial galvanic protection when it is applied to a correctly prepared metallic surface at the required film thickness.
Can ROVAL RS repair hot dip galvanized steel?
Yes. It is intended for properly prepared galvanized steel repairs such as welds, cut edges, drilled points, fasteners and local damage. The governing project or galvanizing specification must permit the repair method.
How many coats are required?
The usual system is two coats at about 40 μm dry film thickness per coat. The final requirement must follow the current technical data and project specification.
What area does a 1.5 kg tin cover?
The theoretical area is 3 m² per 1.5 kg tin at the specified film build. Actual coverage will be lower after allowing for surface profile, shape, overspray and normal application losses.
How long does ROVAL RS take to dry?
The current technical data gives about 30 minutes for touch drying and overcoating at 20°C and 65% relative humidity for a 40 μm coat. Full cure is stated as 24 hours under those test conditions. Actual drying varies with temperature, humidity, airflow and film thickness.
How can ROVAL RS be applied?
It can be applied by brush, roller, conventional spray or airless spray. Thorough mechanical mixing is required. Thinning, nozzle size, pressure and filtration must follow the current manufacturer data.
Will the repair exactly match hot dip galvanizing?
ROVAL RS gives a silver galvanized appearance, but a permanent exact colour match cannot be guaranteed. The original galvanizing and the repair coating may weather at different rates.
Is ROVAL RS available across Pakistan?
Yes. Marjan Polymer Industries supplies ROVAL RS across Pakistan, subject to stock, order quantity and transport coverage.
Where can I obtain technical and safety documents?
The current manufacturer Technical Data Sheet and Safety Data Sheet are linked above. Contact Marjan Polymer Industries if you need project documents or technical clarification before purchase or application.