PPG NovaGuard 4801 is a high performance coating for new or old steel with excellent resistance to chemicals at high temperatures and (in)organic acids. With good resistance to a wide range of solvents, NovaGuard 4801 is suitable for high temperature immersion and for application on concrete on top of Novaguard 4701.

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• Features & Benefits
• Technical Data
• Recommended Substrate Conditions and Temperatures
• Instructions For Use
• Additional Data
• Safety Precautions
• References

Features & Benefits

• Two-component, glass flake reinforced novolac vinyl ester
• High performance coating for new or old steel
• Excellent resistance to chemicals at high temperatures
• Excellent resistance to (in)organic acids
• Good resistance to a wide range of solvents
• Suitable for high temperature immersion
• Suitable for application on concrete on top of Novaguard 4701

Technical Data

Basic data (at 20°C)

Notes:

• A film shrinkage up to 20% can be expected, due to the specific reaction mechanism and depending on conditions
• Frequent temperature cycles may shorten the shelf life
• See Additional Data further below for details on spreading rate and film thickness, overcoating intervals, and curing times

Recommended Substrate Conditions and Temperatures

Steel

• Steel; blast cleaned to ISO Sa 2½ or SSPC-SP-10, blasting profile 50 – 75 µm (2.0 – 3.0 mils)

Coated concrete

• Suitable primer must be dry and free from any contamination

Substrate temperature and application conditions

• Substrate temperature during application and curing should be above 10°C
• Substrate temperature during application and curing should be at least 3°C above dew point

Instructions For Use

Mixing ratio by volume: base to catalyst 98:2

• The reaction between the base component and catalyst is highly exothermic, deviation from the recommended mixing ratio should not be undertaken
• Pre-mix base component with a pneumatic air mixer at moderate speeds to homogenize the container
• Add the catalyst while stirring the base
• Mix thoroughly before application

Pot life

• 50 minutes at 40°C

Note: The pot life will vary substantially with temperature.

Application

• Never add any solvent
• Never add the catalyst without continuous stirring
• Never add more than the recommended amount of catalyst

Airless spray

• AIRLESS PUMP 45:1 or greater, fit leather or PTFE seals and remove fluid filters, 10 mm diameter (0.375 in) nylon-lined hoses, large-bore gun with 0.6 to 1.5 mm (0.024 to 0.059 in) reverse clean tip
• Typical tip size is 0.75 – 0.85 mm (0.030 – 0.033 in) with reverse clean and 45° fan
• The size of tip and fan pattern will vary with the nature of the work
• Pressure to suit hose lengths and working conditions (circa 200 bar)

Cleaning solvent

THINNER 50-02

Additional Data

Notes:

• Surface should be dry and free from any contamination before recoating
• The maximum recoating time will reduce significantly at high temperature or in strong sunlight
• Once the maximum recoating time has been reached, adhesion values attained by a subsequent coat will reduce dramatically
• Styrene cannot be used to reactivate the surface of this product and may impair adhesion

Note: Adequate ventilation must be maintained during application and curing.

Safety Precautions

• Since improper use and handling can be hazardous to health and cause of fire or explosion, safety precautions included with Product Data/Application Instruction and Material Safety Data Sheet must be observed during all storage, handling, use and drying periods
• Although this is a solvent-free paint, care should be taken to avoid inhalation of spray mist, as well as contact between the wet paint and exposed skin or eyes
• The catalyst of this product is supplied in small polythene bottles separately from the pigmented base component
• The catalyst of this product is an organic peroxide which is a highly reactive, combustible and thermally unstable substance that can undergo self-accelerating decomposition
• It is also a powerful oxidizing agent and will react violently with other organic chemicals
• It is thus recommended to keep in original containers, to hold within the predetermined temperature limits, to prevent contact/contamination with other materials, and to minimize the quantity at the workplace – only have enough present for the job in hand
• The waste of this product should be treated with special care; please contact your PPG representative for more details

References