Interseal 670HS Low Temperature, and over intact aged coatings

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Product description

Ambient-temperature curing EGA247 (EGA056 supplied in North America). A low-VOC, two-component, high-build, high-solids surface-tolerant epoxy maintenance coating.

Intended use

For application over various substrates, including hand-prepared rusted steel, abrasive-blasted steel and water-blasted steel, and intact aged coatings.

Provides excellent corrosion protection for industrial structures, coastal structures, paper mills, bridges and offshore structures in atmospheric exposure and immersed environments.

Application data

INTERSEAL 670HS

¹ Data for immersed areas. For non-immersion areas, the maximum overcoating interval is 'unlimited'; see AkzoNobel's Definitions and Abbreviations.

For details of the topcoat overcoating intervals, see the 'Product Characteristics' section. When polysiloxane topcoats are used, the maximum overcoating interval is shortened. For details, consult International Paint.

The touch-dry times in the table above are chemical curing times, not the physical film-forming curing times at temperatures below 0 °C (32 °F).

An ambient-temperature version is also available; refer to the ambient-temperature version datasheet

Regulatory compliance data

Surface Preparation

The performance of this product depends on the degree of surface preparation. Surfaces to be painted must be clean, dry and free of contaminants. Before painting, all surfaces must be assessed and prepared in accordance with ISO 8504:2000.

Accumulations of dirt and soluble salts must be removed. Accumulated dirt is generally removed with a dry bristle brush. Soluble salts should be washed off with fresh water.

Abrasive blasting: if used underwater, Interseal 670HS shall be applied over surfaces blast-cleaned to Sa2½ (ISO 8501-1:2007) or SSPC-SP10; if used in atmospheric environments, Interseal 670HS achieves optimum performance when applied over surfaces blast-cleaned to at least Sa2½ (ISO 8501-1:2007) or SSPC-SP6. Surface defects exposed by blasting shall be abraded, filled or otherwise treated. A surface profile of 50–75 µm (2–3 mil) is recommended.

Hand or power tool preparation: clean to St 2 (ISO 8501-1:2007) or SSPC-SP2 minimum.

Note: all mill scale must be removed; areas that cannot be suitably prepared by chipping or needle gun must be spot blast cleaned to Sa 2 (ISO 8501-1:2007) or SSPC-SP6 minimum. This generally applies to rust grades C or D of this standard.

Ultra-high-pressure water jetting/wet blasting may be applied over surfaces prepared to Sa2½ (ISO 8501-1:2007) or SSPC SP6, with flash rust allowed to a standard not lower than HB2½M (see the International Paint hydroblasting standard) or SB2½M (see the International Paint slurry blasting standard). In some cases, application over damp surfaces is possible. For more information, contact International Paint.

Aged coatings: Interseal 670HS is suitable for overcoating on a limited range of aged coatings, which shall be intact and firmly adhered. Loose or flaking coatings shall be removed to a firm film edge. Glossy topcoats may require light abrading to provide an adhesion 'key'. For more information, see the 'Characteristics' section.

Application

(1) Stir the base (Component A) with a power mixer.

(2) Mix all of the curing agent (Component B) with the base (Component A) and stir thoroughly with a power mixer.

Mixed paint should not be resealed. If work is interrupted for too long, mix a fresh batch of paint for application.

Surplus paint and empty containers must be disposed of in accordance with the relevant regional regulations.

Product Characteristics

For water-immersed environments, prepare the surface to a minimum of Sa 2½ (ISO 8501-1:2007) or SSPC-SP10, then apply multiple coats of Interseal 670HS, with a minimum total dry film thickness of 250 µm (10 mil).

For underwater use, colours tinted by the Chromascan system shall not be used for the first coat of the coating system.

Apply by airless spray to achieve the maximum film thickness per coat. Application methods other than airless spray cannot achieve the required film thickness. With air spray, several cross coats are required to achieve the maximum film thickness. At low or high temperatures, special application techniques may be required to achieve the maximum film thickness.

If salt water is used during wet blasting, the treated surface must be thoroughly washed with fresh water before applying Interseal 670HS. Light spot rusting of freshly blasted surfaces is acceptable, preferable to a surface that is too wet. Puddles, standing water and accumulated water must be removed.

Interseal 670HS may be used over suitably sealed or primed concrete surfaces; for further coating system and primer recommendations, contact International Paint Protective Coatings.

Interseal 670HS is suitable for overcoating on intact aged alkyd, epoxy and polyurethane coating systems. However, it is recommended not to apply the product where thermoplastic coatings such as chlorinated rubber and vinyl have previously been used. Consult International Paint for other recommendations.

The surface temperature shall always be at least 3 °C (5 °F) above the dew point. Interseal 670HS cures below 0 °C (32 °F). However, the product should not be applied at 0 °C (32 °F), because there may be ice on the substrate.

Gloss and surface evenness depend on the application method. Avoid mixing different application methods as far as possible.

As with all epoxy coatings, the product will chalk and fade when exposed to the atmosphere. This does not affect its anticorrosive performance. The actual chalking rate depends on the climatic conditions and is usually limited to a thin surface layer. If the chalked layer is exposed to UV light and intermittent high-velocity water washing, it will erode; only in this case does chalking reduce the anticorrosive performance of the coating.

Premature exposure to standing water may cause colour change, especially for dark colours.

Modified by adding GMA 132 (crushed flint) aggregate, Interseal 670HS can be used as a non-slip deck paint system, applied over suitably primed surfaces. Typical thickness is 500–1000 µm (20–40 mil). Apply with a suitable large-orifice spray gun (e.g. Sagola 429 or an air spray gun with a 5–10 mm nozzle). Small areas may be applied by trowel or roller, or by broadcast technique. For details, consult International Paint.

Recommended topcoat overcoating interval, minimum overcoating interval, recommended topcoat

Note: VOC values are typical and for guidance only. They may vary with colour and general production tolerances.

Although the low-molecular-weight reactive additive becomes part of the film when cured under normal ambient conditions, analysis by EPA Method 24 shows that it also affects the VOC value.

System compatibility

Interseal 670HS is normally applied over suitably prepared steel, but may be used over suitably primed surfaces.

Suitable primers include

Supplementary information

Safety precautions

This product must be applied at the production site by professional applicators in accordance with the recommendations in this manual, the Material Safety Data Sheet and the instructions on the container label. Do not use this product without first reviewing the Material Safety Data Sheet (MSDS) that International Paint provides for its customers.

All work related to the application and use of this product must be carried out in accordance with the relevant national health, safety and environmental standards and regulations.

If welding or flame cutting is required on metal coated with this product, dust and fumes will be generated; use appropriate personal protective equipment and adequate local ventilation.

If in doubt about the suitability of this product for the intended use, consult AkzoNobel for further advice.

Packaging Specifications

For other packaging sizes, contact AkzoNobel.

Shipping weight

Storage

Important note

The information given in this product data sheet is not exhaustive. Anyone who uses, for any purpose, any product other than those specifically recommended in this data sheet without first obtaining our written confirmation does so at their own risk as regards the suitability of the product for the intended purpose. Although to the best of our knowledge all advice or statements given about the product (whether in this data sheet or otherwise) are correct, we cannot control the quality or condition of the substrate, nor the many factors affecting the use and application of the product. Accordingly, unless we specifically agree otherwise in writing, we accept no liability, to the maximum extent permitted by law, for any product performance problem arising, or for any loss or damage caused by use of the product. We hereby disclaim any warranty or representation, express or implied, arising by operation of law or otherwise, including but not limited to any implied warranty of merchantability or fitness for a particular purpose. All products supplied and all technical guidance provided are subject to our standard terms and conditions of sale. You should obtain a copy of this document and read it carefully. The information contained in this product data sheet may be amended at any time in the light of experience and of our product development policy. Before using the product, it is the customer's responsibility to check with the local representative that the data sheet in their possession is the latest version.

This product data sheet is available on www.international-marine.com or www.international-pc.com and should be identical to this copy. If the version on the website differs from this one, the version on the website shall prevail.

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Data is subject to the manufacturer's latest version; in all cases the manufacturer's latest TDS prevails.