Drying Times

¹ See International Protective Coatings Definitions and Abbreviations.

Maximum overcoating intervals are shorter when using polysiloxane topcoats. Consult International Protective Coatings/Rawlins Technical Support 0113 2455450 (option 2) or send a message to [email protected] for further details.

Regulatory Data

See Product Characteristics section for further details.

Surface Preparation

All steel surfaces to be coated should be clean, dry and free from contamination. Prior to paint application, all surfaces should be assessed and treated in accordance with ISO 8504-2000. Oil or grease should be removed in accordance with SSPC-SP1 solvent cleaning.

Steel

Abrasive blast clean to a minimum of Sa2½ (ISO 8501-1:2007) or SSPC-SP6. If oxidation has occurred between blasting and application of Intergard 251HS the surface should be re-blasted to the specified visual standard. Surface defects revealed by the blast cleaning process should be ground, filled, or treated in the appropriate manner.

A surface profile of 40-75 microns (1.5-3.0 mils) is recommended.

Shop Primed Steelwork

Weld seams and damaged areas should be abrasive blast cleaned to a minimum Sa2½ standard (ISO 8501-1:2007) or SSPC SP6. Where this is not practical, preparation to SSPC SP11 is acceptable.

Application

Mixing

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 a power agitator
2. Combine entire contents of Curing Agent (Part B) with Base (Part A) and mix thoroughly with power agitator

Mix Ratio

• 3 part(s) : 1 part(s) by volume

Pot Life

Applicators

Cleaning/Thinning

Work Stoppages

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

Clean all equipment immediately after use with International GTA822. It is good working practice to periodically clean equipment during the course of the working day. Frequency of cleaning will depend upon amount used, temperature and elapsed time, including any delays.

All surplus materials and empty containers should be disposed of in accordance with appropriate regional regulations/legislation.

Product Characteristics

Intergard 251HS is preferred for use with systems for chemical environments where zinc based materials can be subject to attack in both acidic and alkaline conditions

Apply in good climatic conditions. The temperature of the surface to be coated must be at least 3°C (5°F) above the dew point.

Over-application of Intergard 251HS will extend both the minimum overcoating periods and handling times.

When applying Intergard 251HS by brush or roller, it may be necessary to apply multiple coats to achieve the required film build.

In common with all epoxies, Intergard 251HS will chalk and discolour on exterior exposure. Where a durable cosmetic finish with good gloss and colour retention is required overcoat with recommended topcoats.

Intergard 251HS is not designed for continuous water immersion.

An alternative curing agent to improve application properties in tropical climates is also available - please contact our technical support team for more details on 0113 2455450 (option 2) or send a message to [email protected].

The following drying times and overcoating intervals apply when the tropical climate curing agent is used;

¹ See International Protective Coatings Definitions and Abbreviations.

Pot Life

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

Low molecular weight reactive additives, which will form part of the film during normal ambient cure conditions, will also affect VOC values determined using EPA Method 24.

Systems Compatibility

Intergard 251HS is normally applied directly to steel, however, it can be applied over the following primers:

• Interzinc 22
• Interzinc 52

Recommended topcoats are:

• Interchar 1190
• Interchar 212
• Interfine 878
• Interfine 979
• Intergard 345
• Intergard 475HS
• Intergard 740
• Interseal 670HS
• Interthane 870
• Interthane 990
• Interzone 954

For other suitable topcoats, consult International Protective Coatings or Rawlins Technical Support.