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Interline 850

A two pack, high solids, epoxy phenolic coating.

Intended uses

A tank coating which is approved for the carriage of potable water. For use at Newbuilding or Maintenance & Repair.

color TLA850-White, TLA851-Grey
Finish/Sheen Not applicable
Part B (Curing Agent) TLA856
Volume Solids 76% ±2% (ISO 3233:1998)
Mix Ratio 4.00 volume(s) Part A to 1 volume(s) Part B
Typical Film Thickness 125 microns dry (164 microns wet)
Theoretical Coverage 6.08 m2/litre at 125 microns dft, allow appropriate loss factors
Method of Application Airless Spray, Roller, Brush
Flash Point Part A 42°C; Part B 54°C; Mixed 43°C
Induction Period 15 minutes at temperatures below 15°C

Drying Information

  Substrate Temperature
  10°C 15°C 25°C 35°C
Touch Dry [ISO 1517:73] 9 hrs 8 hrs 5 hrs 3 hrs
Hard Dry [ISO 9117:90] 24 hrs 20 hrs 8 hrs 5 hrs
Pot Life 3 hrs 2 hrs 60 mins 30 mins


Overcoating Data

Overcoated By Substrate Temperature
  0°C 15°C 25°C 35°C
  Min Max Min Max Min Max Min Max
Interline 850 24 hrs 30 days 20 hrs 30 days 8 hrs 30 days 5 hrs 21 days

Regulatory data


225 g/lt as supplied (EPA Method 24) 145 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.


MIL-PRF-4556 (White and Buff shade only)


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

  • Potable Water - Certification for tanks greater than 500 gallons (ANSI Standard 61)
  • Potable Water - Compliant with The Vessel Sanitation Programme (VSP) Construction Guidelines
  • Potable Water - Carriage of Potable Water (Folkehelseinstituttet, Norway)
  • Potable Water - Certification for tanks greater than 40,000mm2/lt (AS / NZS 4020 : 2005)
  • Food Contact - FDA Compliant
  • Type Approval - Russian Maritime Register of Shipping

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 potable water tanks, consult the Interline 850 Potable Water Tank 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 damaged areas should be blast cleaned to Sa21⁄2 (ISO 8501-1:2007) or power tooled to Pt3 (JSRA SPSS:1984) Intact shop primer should be prepared by abrasive blast cleaning to Sa21⁄2 (ISO 8501-1:2007). A sharp, angular surface profile of 50-100 microns is recommended. 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.


Where necessary, remove weld spatter and smooth weld seams and sharp edges. This product must only be applied to surfaces prepared by abrasive blast cleaning to Sa21⁄2 (ISO 8501-1:2007). A sharp, angular surface profile of 50-100 microns is recommended. Interline 850 must be applied before oxidation of the steel occurs. If oxidation does occur the entire oxidised area should be reblasted to the standard specified above. Surface defects revealed by the blast cleaning process, should be ground, filled, or treated in the appropriate manner.


Consult International Paint. 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. (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, GTA415 only in exceptional circumstances. DO NOT thin more than allowed by local environmental legislation. When applying Interline 850 in tanks to be used for potable water storage, NSF certification allows a maximum thinner addition of 5% by volume.

Airless Spray

Recommended Tip Range 0.53-0.68 mm (21-27 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/GTA853

Work Stoppages and Cleanup

Do not allow material to remain in hoses, gun or spray equipment. Thoroughly flush all equipment with International GTA415/GTA853. 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/GTA853. 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.


When used in cargo tanks Interline 850 should not be applied below 10°C. However, for potable water tanks, Interline 850 may be applied at steel temperatures down to 5°C. Consult International Paint for specific cure schedules. The drying times and overcoating intervals may alter due to various on-site factors such as tank configuration, ventilation rates, etc. The tank should be flushed adequately with potable water prior to filling. Discolouration of the coating may occur during washing, depending on the ionic content (eg: Cu2+, Fe3+) of the water, coating performance will not be affected. For the drying time to filling and flushing procedure consult International Paint. For minimum cure time prior to flooding coated tanks, consult the detailed coating application procedures. 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
20 lt 16 lt 20 lt 4 lt 5 lt
5 US gal 4 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
20 lt 30.33 Kg
5 US gal 69.1 lb


Shelf Life 12 months minimum at temperatures up to 25°C. Subject to reinspection thereafter. Store in dry, shaded conditions away from sources of heat and ignition.