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Intershield 456

A high solids epoxy primer. Developed to meet the requirements of MIL-PRF-24667, Types I, II and V, Composition G and L primer system.

Intended uses

For use at Newbuilding, Maintenance & Repair or On Board Maintenance. A primer for Intershield 6GV, Intershield 6LV or Intershield 5150LWT non-skid deck coatings.

color EGA600-Orange, EGA602-Buff
Finish/Sheen Not applicable
Part B (Curing Agent) EGA601
Volume Solids 84% ±2% (ASTM D2697-86)
Mix Ratio 3 volume(s) Part A to 1 volume(s) Part B
Typical Film Thickness 125 microns dry (149 microns wet), 100 - 175 microns dry practical range equivalent to 119 - 208 microns wet
Theoretical Coverage 6.72 m2/litre at 125 microns dft, allow appropriate loss factors
Method of Application Airless Spray, Brush, Roller
Flash Point Part A 43°C; Part B 52°C; Mixed 43°C
Induction Period 15 minutes at temperatures below 23°C

Drying Information

  Substrate Temperature
  10°C 25°C 35°C
Hard Dry [ASTM D1640 7.7] 20 hrs 8 hrs 5 hrs
Pot Life 105 mins 60 mins 30 mins

Overcoating Data

Overcoated By Substrate Temperature
  10°C 25°C 35°C
  Min Max Min Max Min Max
Intershield 456 24 hrs 72 hrs 8 hrs 72 hrs 5 hrs 72 hrs
Intershield 6GV 24 hrs 72 hrs 8 hrs 72 hrs 5 hrs 72 hrs
Intershield 6LV 24 hrs 72 hrs 8 hrs 72 hrs 5 hrs 72 hrs
Intershield 5150LWT 24 hrs 72 hrs 8 hrs 72 hrs 5 hrs 72 hrs
Interthane 990 24 hrs 72 hrs 8 hrs 72 hrs 5 hrs 72 hrs
Interthane 990HS 24 hrs 72 hrs 8 hrs 72 hrs 5 hrs 72 hrs


Drying times and pot life will vary with ambient temperature and/or humidity changes.

Regulatory data


120 g/lt (1.00 lb/US Gal) as supplied (EPA Method 24)


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.


MIL-PRF-24667 Type VII, Composition G & L MIL-PRF-24667 Types I, II, V, Composition G & L

System and compatibility

Consult your International Paint representative for the system best suited for the surfaces to be protected. Refer to International Paint Coating Application Guidelines for additional information.

  • Intershield 456/Intershield 6GV
  • Intershield 456/Intershield 6GV/Interthane 990
  • Intershield 456/Intershield 6GV/Interthane 990HS


  • Intershield 456/Intershield 6LV
  • Intershield 456/Intershield 6LV/Interthane 990
  • Intershield 456/Intershield 6LV/Interthane 990HS


  • Intershield 456/Intershield 5150LWT
  • Intershield 456/Intershield 5150LWT/Interthane 990
  • Intershield 456/Intershield 5150LWT/Interthane 990HS

Surface preparations

Paint only clean, dry surfaces. Remove all grease, oil, soluble contaminants and other foreign matter by "solvent cleaning" in accordance with SSPC-SP1 standard.


For optimum performance "Near White Blast Cleaning" (SSPC-SP10) is recommended. Hydroblasting to International Paint HB21⁄2L (SSPC WJ2), with a light level of flash rust is also acceptable. A minimum surface profile of 75 microns is required. If oxidation has occurred between blasting and application of Intershield 456, the surface should be reblasted to the specified standard. Where abrasive blasting is not possible "Power Tool Clean" (SSPC-SP11).


For aluminium and light alloys the surface should be solvent cleaned according to SSPC-SP1 and then physically etched by abrasive blasting. Consult your International Paint representative for specific recommendations.


Apply by brush, roller or spray. Apply mixed material by brush, roller, or spray in an even coat to the properly prepared surface. Apply at 150 microns wet which will yield 125 microns dry film thickness. The recoat schedule must be adhered to. Surfaces must be abraded prior to applying additional coats if maximum recoat time has been exceeded. Consult the following equipment recommendations:


Do not proportion material and do not mix until ready to use. Material is supplied in 2 containers as a unit. Always mix a complete unit in the proportion supplied. (1) Agitate Part A with a power agitator, (2) combine entire contents of Part A and B and mix thoroughly with a power agitator. (3) Allow the coating a 15 minute sweat-in period, at temperatures below 23°C. Do not combine freshly mixed material nearing the end of its pot life.



Airless Spray

Minimum 56:1 ratio pump; 0.017"- 0.023" (432-584 microns) orifice tip; 3/8" (9.5 mm) ID high pressure material hose; 60 mesh tip filter

Conventional Spray

Not applicable


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


Use All Purpose Roller cover with 3/8" (9.5 mm) smooth to medium nap. Prewash roller cover to remove loose fibres prior to use. Application by roller is recommended for small areas only. Multiple coats may be required to achieve specified film thickness.


International GTA415/GTA220

Work Stoppages and Cleanup

Clean all equipment immediately after use with International GTA220/GTA415. It is good working practice to periodically flush out spray equipment during the course of the working day. Frequency of cleaning will depend upon amount sprayed, temperature and elapsed time, including any delays. 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.


Apply in good weather when air and surface temperatures are above 10°C. Surface temperature must be at least 3° C above dew point. For optimum application properties, bring material to 21-27°C prior to mixing and application. 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. Technical and application data herein is for the purpose of establishing a general guideline of the coating and proper coating application guidelines. 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 actually 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

Unit size Part A Part B
  Vol Pack Vol Pack
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 shipping weight

Unit size Unit Weight
4 US gal 55 lb


Shelf Life 12 months from date of manufacture when maintained in protected storage at 4-38°C. Subject to reinspection thereafter. Store in dry, shaded conditions away from sources of heat and ignition.