HEMPEL's Under-insulation Anti-corrosive 275

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275

Product Characteristics

Description

Hempel's Anti-corrosion Coating under Insulation 275 is a modified phenolic epoxy product based on fast-drying, alkylamine-cured epoxy resin. It provides long-lasting barrier protection in coating systems and is suitable for severe corrosive environments, including high-temperature and wet conditions under insulation materials. It is available with or without glass flake.

Recommended use

Hempel's Anti-corrosion Coating under Insulation 275 can be used in locations where corrosion under insulation (CUI) normally occurs or thermal cycling exists, with an extremely wide applicable temperature range. Its specified operating temperature range is

-196°C (-321°F) to 204°C (400°F), with occasional maximum temperature up to 275°C (527°F). Compared with conventional epoxy phenolic coatings, when used at high dry film thickness (DFT), the product significantly reduces the risk of cracking. The product can be used for new construction, maintenance and repair of carbon steel and stainless steel structures, in both insulated and uninsulated service.

Service temperature

• Short-term temperature resistance up to: 275°C [527°F].

Certificates / approvals

- When used as part of a specified coating system, meets ISO 12944 requirements. C5-H, CX - When used as part of a pre-specified paint system, complies with ISO 19277 requirements. For categories CUI-1, CUI-2, CUI-3, CUI-1-Cryo, CUI-2-Cryo, CUI-3-Cryo - tested and evaluated in accordance with NACE TM0174; standard test method for evaluating protective coatings for entry into service. Resistant to boiling tap water, Method B.

• When used as part of the specified coating system, meets the requirements of NORSOK M-501.

Edition 7, System 1D, 6C, 9.

Product features

• Fast recoat.

• Wide temperature resistance range, from low temperatures to 275°C (527°F).

• Can be used at temperatures as low as -10°C (14°F).

• Can be applied by spray on hot surfaces at temperatures up to 204°C (400°F).

• Compared with conventional epoxy phenolic coatings, it offers high crack resistance.

VOC content (after mixing the multi-component paint)

Subject to specific legislation; see the explanatory notes on the Hempel website hempel.com or your local Hempel website. VOC values may vary with colour; refer to Section 9 of the Safety Data Sheet. This product complies with the VOC requirements of national mandatory or recommended standards; consult the company representative for details.

Handle with care. Before and during use, observe the safety labels on the packaging and paint containers and comply with all local and national safety regulations. Consult the Hempel Safety Data Sheet and Product Data Sheet for the product at all times.

For professional use only.

Product Data

Curing Agent 95072

1.3 kg/L 275

_______________________________

Gloss

Refer to the Hempel Guide for Aluminium-containing Coatings.

1.3 kg/L

Surface Preparation

Cleanliness

• Remove oil, grease and other contaminants by cleaning with a suitable cleaner.

• Remove salts, detergents and other contaminants by high-pressure fresh water washing.

• Maximum flash rust grade FR M (ISO 8501-4).

New construction

• Abrasive blast clean to Sa 2½ (ISO 8501-1) / SP 10 (SSPC) minimum.

• Remove dust, blast abrasives and loose material.

• Water jetting to Wa 2½ (ISO 8501-4) minimum

Maintenance and repair

• Square off small damaged areas and combine them into one large area.

• Feather the edges into sound surrounding coating.

• Remove dust, blast abrasives and loose material.

• Abrasive blast clean to Sa 2½ (ISO 8501-1) / SP 10 (SSPC) minimum.

• For small areas where abrasive blasting is not possible, clean by hand or with power tools.

• Clean thoroughly by hand or power tool to St2 (ISO 8501-1) / SP2 (SSPC).

Avoid polishing.

• Water jetting to Wa 2½ (ISO 8501-4) minimum

Roughness

• Surface roughness Medium (G) (ISO 8503-2).

For further details, refer to the separate Hempel document Surface Preparation Guide.

Application

Mixing Ratio

Base 17539 : Hardener 95072 (3 : 1 by volume)

Stir thoroughly before use.

Pot Life

Recommended method

275

Film thickness

Depending on the end use and service area, the product may be specified at film thicknesses other than those indicated. This will alter the spreading rate, drying and curing times and recoat interval. To achieve optimum performance, avoid excessive film thickness.

Application conditions

• The surface to be coated must be clean and dry, and its temperature must be at least 3 °C [5 °F] above the dew point to avoid condensation.

• During application and curing, the surface temperature must be above -10 °C [14 °F].

Notes

• Stir thoroughly before use.

Drying and recoat

Product compatibility

- Previous coat: Recommended products: Hempel's High-solids Inorganic Zinc-rich Coating 850 - Subsequent coat: Recommended products: Hempel's Polyurethane High-build Topcoat 55610, Hempel's Silicone Acrylic Coating 56940, Hempel's Polysiloxane Topcoat 55030

Drying Time

Measured at 150 µm dry film thickness under standard conditions; see Hempel's explanatory notes.

Recoat

Hempel's specifications supersede all guidance shown in the recoat table.

Extendable* Depending on the actual exposure conditions, the coated surface may be recoated after an extended time. Contact your local Hempel representative for advice.

For products of the same generic chemical composition, recoat times are for reference only.

For further information, refer to Hempel's specifications.

Recoat notes

• For recoating inorganic zinc coatings, a mist coat technique is recommended.

• If the maximum recoat interval is exceeded, the surface must be roughened to ensure intercoat adhesion.

• The surface must be clean before recoating.

• Inorganic zinc silicate must be fully cured before recoating.

If the maximum overcoating interval between the epoxy and the topcoat is exceeded, apply a thin coat of epoxy.

Others

• The coating film must be dry and cured before insulation treatment.

Storage

Shelf Life

275

Storage conditions

- Store the product in accordance with the Safety Data Sheet, label and local regulations. Keep containers in a dry, cool, well-ventilated place away from heat and sources of ignition. Keep containers tightly closed. Handle with care.

Carbon footprint

Carbon footprint is based on a 1 µm dry film thickness formed over a surface area of 1 m².

The scope includes raw materials, transport to the Hempel factory, the Hempel production process, and any volatile organic compounds (VOC) emitted during and after use of the product.

Calculated based on the standard colours defined in this PDS. Values may vary with colour.

Supplementary documents

For further information, refer to the Hempel website (https://www.hempel.com/service-and-support/technical-guidelines) or your local Hempel website:

• Notes to the Product Data Sheet.

• Application Methods
• General application guide
• Aluminium Coatings Guide.

datasheet, which is also available for download at www.hempel.com.

This Product Data Sheet (“PDS”) relates to the product supplied (the “Product”), and its content is updated from time to time. Accordingly, the buyer/applicator should refer to the PDS supplied with the relevant batch of product (rather than an earlier version). In addition to the PDS, the buyer/applicator may receive some or all of the specifications, declarations and/or guides shown below, which are also available for download from the “Products” page of the Hempel website (www.hempel.com) (hereinafter the “Supplementary Documents”):

If the information in the PDS and the supplementary documents is inconsistent, the information shall take precedence in the order listed above. In this case, contact the Hempel representative for clarification. In addition, the buyer/applicator must give full consideration to the relevant safety information accompanying each product. Hempel accepts no liability for any defects arising from application not carried out fully in accordance with the recommendations and requirements of the relevant PDS and supplementary documents. The information and terms in this disclaimer apply to this PDS, the supplementary documents and any other relevant documents provided by Hempel for this product. In addition, unless otherwise expressly agreed in writing, supply of the product and all technical support are subject to Hempel's General Conditions of Sale, Delivery and Service.

Information is subject to the manufacturer's latest version; the manufacturer's latest TDS prevails.
The technical parameters on this page are taken from the product's original manufacturer technical datasheet, the copyright of which belongs to the manufacturer. If a rights holder considers the presentation inappropriate, contact us for verification and handling.