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Intergard 423

A tar free, light coloured, epoxy coating which is winter workable down to -5°C.


For use as an anticorrosive in ballast tanks, cofferdams and void spaces. Suitable for use with controlled cathodic protection.
For use at Newbuilding or Maintenance & Repair.


KBA420-Buff, KBA422-Aluminium Grey, KBA426-Light Red, KBA427-Grey (KBA424-Off White, KBA429-Black Available in North America only.)

Finish/Sheen Sheen
Part B (Curing Agent) KBA423
Volume Solids 68% ±2% (ISO 3233:1998)
Mix Ratio

3 volume(s) Part A to 1 volume(s) Part B

Typical Film Thickness

125 microns dry (184 microns wet)

Theoretical Coverage

5.44 m2/litre at 125 microns dft, allow appropriate loss factors

Method of Application Airless Spray, Roller, Brush
Flash Point

Part A 25°C; Part B 26°C; Mixed 28°C (Product produced and supplied in North America has flash points of Part A 29°C , Part B 25°C and Mixed 28°C respectively due to locally sourced solvents. There is no detrimental effect on product performance.)

Induction Period Not required

Drying Information

  Substrate Temperature
  5°C 10°C 25°C 35°C
Touch Dry [ISO 9117/3:2010] 6 hrs 4 hrs 60 min 50 mins
Hard Dry [ISO 9117-1:2009] 24 hrs 14 hrs 6 hrs 3 hrs
Pot Life 6 hrs 5 hrs 2 hrs 60 mins

Overcoating Data

see limitations

Overcoated By Substrate Temperature
5°C 25°C 35°C
  Min Max Min Max Min Max Min Max
Intergard 423 24 hrs 15 days 14 hrs 15 days 6 hrs 15 days 4 hrs 15 days


320 g/lt as supplied (EPA Method 24)
199 g/kg of liquid paint as supplied. EU Solvent Emissions Directive (Council Directive 1999/13/EC)


VOC values are typical and are provided for guidance purposes only. These may be subject to variation depending on factors such as differences in colour and normal manufacturing tolerances.


When used as part of an approved scheme, this material has the following certification:

  • Fire Resistance - Surface Spread of Flame (WFR) - (IMO Resolution A653 (16))

  • Food Contact - Carriage of Grain (NOHA)

  • NORSOK M-501, Rev 4, system no.1 (NITN)

  • Tank Coatings - Recognised Corrosion Control Coating (LR)

  • Tank Coatings - Ballast Tank type approval (GL)

  • Tank Coatings - B1 Classification of Ballast Tank Coatings (DNV/Marintek tested)

  • Fire Resistance - Marine Equipment Directive compliant

    Consult your International Paint representative for details.



Consult your International Paint representative for the system best suited for the surfaces to be protected.


Use in accordance with the standard Worldwide Marine Specifications.
All surfaces to be coated should be clean, dry and free from contamination.
High pressure fresh water wash or fresh water wash, as appropriate, and remove all oil or grease, soluble contaminants and other foreign matter in accordance with SSPC-SP1 solvent cleaning.
Intergard 423 can be applied over Intergard 269, when used as a holding primer to protect the blast. The primer surface should be dry and free from all contamination and Intergard 423 must be applied within the overcoating interval specified (consult the Intergard 269 product data sheet).


Where necessary, remove weld spatter and smooth weld seams and sharp edges.
Weld seams and areas of shop primer damage or breakdown should be blast cleaned to Sa21⁄2 (ISO 8501-1:2007) or power tooled to Pt3 (JSRA SPSS:1984).
Intact, approved, shop primers must be clean, dry and free from soluble salts and any other surface contaminants. Unapproved shop primers will require complete removal by blast cleaning to Sa21⁄2 (ISO 8501-1:2007). In some cases sweep blasting to a defined International Paint standard (eg AS2 or AS3) may be acceptable. Consult your International Paint representative for specific recommendations.


Abrasive blast clean to Sa21⁄2 (ISO 8501-1:2007).


Consult International Paint.
For blasted areas, the primer should be applied before oxidation occurs. If oxidation does occur, the entire oxidised area should be reblasted to the specified standard above.


For tank coating projects, consult International Paint for the detailed tank coating procedures that should be followed.
Consult your International Paint representative for specific recommendations.



Material is supplied in 2 containers as a unit. Always mix a complete unit in the proportions supplied. Once the unit has been mixed it must be used within the working pot life specified.
(1) Agitate Base (Part A) with a power agitator.
(2) Combine entire contents of Curing Agent (Part B) with Base (Part A) and mix thoroughly with power agitator.


Use International GTA220 only in exceptional circumstances. DO NOT thin more than allowed by local environmental legislation.

Airless Spray

Tip Range 0.53-0.66 mm (21-26 thou)
Total output fluid pressure at spray tip not less than 176 kg/cm2 (2500 p.s.i.)

Conventional Spray

Application by conventional spray is not recommended.


Application by brush is recommended for small areas only. Multiple coats may be required to achieve specified film thickness.


Application by roller is recommended for small areas only. Multiple coats may be required to achieve specified film thickness.


International GTA415/GTA822

Work Stoppages and Cleanup

Do not allow material to remain in hoses, gun or spray equipment. Thoroughly flush all equipment with International GTA415/GTA822. Once units of paint have been mixed they should not be resealed and it is advised that after prolonged stoppages work recommences with freshly mixed units.

Clean all equipment immediately after use with International GTA415/GTA822. Spray equipment requires flushing with this solvent. It is good working practice to periodically flush out spray equipment during the course of the working day. Frequency will depend upon factors such as amount sprayed, temperature and elapsed time including work stoppages. Monitor material condition. Do not exceed pot life limitations.
All surplus materials and empty containers should be disposed of in accordance with appropriate regional regulations/legislation.



In the event welding or flame cutting is performed on metal coated with this product, dust and fumes will be emitted which will require the use of appropriate personal protective equipment and adequate local exhaust ventilation. In North America do so in accordance with instruction in ANSI/ASC Z49.1 "Safety in Welding and Cutting."


All work involving the application and use of this product should be performed in compliance with all relevant national Health, Safety & Environmental standards and regulations.

Prior to use, obtain, consult and follow the Material Safety Data Sheet for this product concerning health and safety information. Read and follow all precautionary notices on the Material Safety Data Sheet and container labels. If you do not fully understand these warnings and instructions or if you can not strictly comply with them, do not use this product. Proper ventilation and protective measures must be provided during application and drying to keep solvent vapour concentrations within safe limits and to protect against toxic or oxygen deficient hazards. Take precautions to avoid skin and eye contact (ie. gloves, goggles, face masks, barrier creams etc.) Actual safety measures are dependant on application methods and work environment.


This product will not cure adequately below -5°C.
Drying times and overcoating intervals may alter due to on-site factors such as tank configuration or ventilation rates etc.
Intergard 423 must not be used in mixed schemes with Intergard 403.
Overcoating information is given for guidance only and is subject to regional variation depending upon local climate and environmental conditions. Consult your local International Paint representative for specific recommendations. Apply in good weather. Temperature of the surface to be coated must be at least 3°C above the dew point. For optimum application properties bring the material to 21-27°C, unless specifically instructed otherwise, prior to mixing and application. Unmixed material (in closed containers) should be maintained in protected storage in accordance with information given in the STORAGE Section of this data sheet. Technical and application data herein is for the purpose of establishing a general guideline of the coating application procedures. Test performance results were obtained in a controlled laboratory environment and International Paint makes no claim that the exhibited published test results, or any other tests, accurately represent results found in all field environments. As application, environmental and design factors can vary significantly, due care should be exercised in the selection, verification of performance and use of the coating.




Unit Size Part A Part B
  Vol Pack Vol Pack
20 lt 15 lt 20 lt 5 lt 5 lt
4 US gal 3 US gal 5 US gal 1 US gal 1 US gal

For availability of other unit sizes consult International Paint


Unit Size Unit Weight
20 lt 33.3 Kg
4 US gal 56 lb


Shelf Life

Part A - 6 months at 25°C
Part B - 12 months at 25°C
Subject to reinspection thereafter. Store in dry, shaded conditions away from sources of heat and ignition.