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Intershield 300HS

A high solids, light coloured, abrasion resistant, aluminium pure epoxy coating giving excellent long term anticorrosive protection and low temperature capability.

Intended uses

A universal primer which can be applied directly to mechanically prepared shop primer or suitably prepared bare steel. Suitable for use with controlled cathodic protection. For use at Newbuilding or Maintenance & Repair.

Certified to ANSI/NSF Standard 61.NSF Certification is for tanks greater than 1,000 gallons

color ENA380-Bronze, ENA381-Aluminium
Finish/Sheen Matt
Part B (Curing Agent) ENA383
Volume Solids 78% ±2% (ISO 3233:1998)
Mix Ratio 2.50 volume(s) Part A to 1.00 volume(s) Part B
Typical Film Thickness 160 microns dry (205 microns wet)
Theoretical Coverage 4.88 m2/litre at 160 microns dft, allow appropriate loss factors
Method of Application Airless Spray, Brush, Roller
Flash Point Part A 42°C; Part B 40°C; Mixed 41°C

Drying Information

  Substrate Temperature
  -5°C 5°C 25°C 35°C
Touch Dry [ISO 9117/3:2010] 10 hrs 8 hrs 3 hrs 2 hrs
Hard Dry [ISO 9117-1:2009] 28 hrs 14 hrs 6 hrs 3 hrs
Pot Life

120 mins

100 mins 60 hrs 50 mins

Overcoating Data

Overcoated By Substrate Temperature
  -5°C 5°C 25°C 35°C
  Min Max Min Max Min Max Min Max
Intershield 300 Immersed Areas 28 hrs 21 days 14 hrs 21 days 7 hrs 14 days 3 hrs 14 days
Intershield 300HS Non Immersed Areas 28 hrs 3 mths 14 hrs 3 mths 7 hrs 3 mths 3 hrs 3 mths
Intergard 263 28 hrs 14 days 14 hrs 14 days 7 hrs 14 days 3 hrs 14 days
Intergard 740 28 hrs 21 days 14 hrs 21 days 7 hrs 21 days 3 hrs 14 days
Intergard 269 28 hrs 6 mths 14 hrs 6 mths 7 hrs 6 mths 3 hrs 6 mths
Interthane 989 28 hrs 5 days 14 hrs 5 days 7 hrs 5 days 3 hrs 3 days
Interthane 990 28 hrs 5 days 14 hrs 5 days 7 hrs 5 days 3 hrs 3 days
Interfine 691 28 hrs 5 days 14 hrs 3 days 7 hrs 3 days 3 hrs 3 days
Interfine 979 28 hrs 7 days 14 hrs 7 days 7 hrs 7 days 3 hrs 7 days
Intersleek 717 - - 14 hrs 14 days 7 hrs 14 days 3 hrs 14 days
Intergard 267 28 hrs 14 days 14 hrs 14 days 7 hrs 14 days 3 hrs 14 days
Intergard 5377 14 hrs 10 days 14 hrs 10 days 7 hrs 10 days 3 hrs 10 days


Consideration should be given when overcoating at low temperatures as the remainder of the system may require higher temperatures to achieve full cure. Intergard 269 and Interfine 691 for Europe only. Interthane 989 for Korea only. Intergard 267 and Intergard 5377 for Americas only.


Regulatory data


206 g/lt as supplied (EPA Method 24) 152 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 product has the following certification:

  • Food Contact - FDA Compliant: Dry Foodstuffs
  • Food Contact - Carriage of Grain (NOHA)
  • Fire Resistance - Surface Spread of Flame (WFR) - (IMO Resolution A653 (16))
  • Fire Resistance - MSC61(67) Smoke & Toxicity (WFR)
  • Fire Resistance - Marine Equipment Directive compliant
  • Potable Water - Certification for tanks greater than 1,000 gallons (ANSI Standard 61)

Potable Water Certification issued by external bodies is dependent upon formulation and/or manufacturing site. Based on this, products supplied in different territories may not be approved to all of the standards listed above. Consult your International Paint representative for details.

System and compatibility

Consult your International Paint representative for the system best suited for the surfaces to be protected. When using in cargo holds, consult the Intershield 300HS Cargo Hold Application Guidelines.

Surface preparations

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.


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 minimum Sa2 (ISO 8501-1:2007) or International Paint Hydroblasting Standard HB2M. If oxidation has occurred between blasting and application of Intershield 300HS, the surface should be reblasted to the specified visual standard. Surface defects revealed by the blast cleaning process, should be ground, filled, or treated in the appropriate manner.


Consult International Paint.


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 two 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 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. Use of thinner for potable water application is not allowed.

Airless Spray

Recommended Tip Range 0.53-0.78 mm (21-31 thou) Total output fluid pressure at spray tip not less than 211 kg/cm2 (3000 p.s.i.)

Conventional Spray

Recommended. Gun Air Cap Fluid Tip DeVilbiss MCB or JGA 704 or 765 E


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 GTA822/GTA220

Work Stoppages and Cleanup

Do not allow material to remain in hoses, gun or spray equipment. Thoroughly flush all equipment with International GTA822/GTA220. 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 GTA822/GTA220. 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.


Intershield 300HS should be high pressure fresh water washed and/or solvent washed prior to overcoating, where necessary, to ensure removal of any surface contamination that has accumulated. Suitable for use on tanker decks subject to Classification Society Regulations. Intershield 300HS may be applied at substrate temperatures down to -5°C, however consideration should be given when overcoating at low temperatures as the remainder of the system may require higher temperatures to achieve full cure. When used as a potable water tank lining a two coat system (10 mil DFT) must be applied and a nominal cure of 30 days minimum at 25°C and 50% relative humidity is required (no thinning is allowed in the potable water system). As part of a two coat potable water scheme, the recommended and allowed recoat interval is 24 hours minimum at 23oC. 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

Unit size Part A Part B
  Vol Pack Vol Pack
17.5 lt 12.5 lt 20 lt 5 lt 5 lt
3.5 US gal 2.5 US gal 5 US gal 1 US gal 1 US gal

Unit shipping weight

Unit size Unit Weight
17.5 lt 22.5
3.5 US gal 43.18 lb


Shelf Life 12 months at 25°C. Subject to re-inspection thereafter. Store in dry, shaded conditions away from sources of heat and ignition. Proceed with caution if storage temperature has exceeded 35°C as gassing and pressure build up of ENA383 may occur.