NavalGuard 4221 Abrasion-resistant Epoxy Coating

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Product Description

A high-solids, high-build polyamide-cured epoxy coating for use as a primer, intermediate coat or topcoat on non-exposed surfaces under severe atmospheric corrosive conditions.

Product Characteristics

• Good sag resistance, allowing a high dry film thickness in one coat
• The film has good flexibility and impact resistance
• Fast drying
• Good intercoat adhesion with both anti-corrosive primers and topcoats
• High volume solids, compliant with environmental requirements

Basic physical and chemical data

Application parameters

Application Methods

Theoretical Spreading Rate

Application data (typical dry film thickness 100 µm)

*The maximum recoat interval depends on the exposure environment and the end use of the coating.

Surface Preparation

All surfaces to be coated must be clean, dry and free of contaminants. Before application, all surfaces must be assessed and prepared in accordance with ISO 8504:2000. Areas of the coating damaged mechanically and showing localised rust must be spot blast cleaned to Sa 2½ or cleaned with power tools to St 3 before local repair. When applied over other existing coatings, remove chalk, zinc salts, grease and other contaminants by suitable methods. When applied over inorganic zinc silicate primers or metal spray surfaces, use an approved tie coat or transitional coat.

Precautions

1. During application, ensure ventilation and air exhaust, keep away from ignition sources, and wear protective equipment such as masks and gloves; maintain adequate ventilation during curing. 2. When mixing, first stir the base uniformly, then add the hardener in the specified ratio and mix uniformly; adjust the amount of thinner according to application needs and temperature changes, stir thoroughly and allow to induce. 3. When applying over inorganic zinc silicate coatings, seal with a tie coat; the product may be applied only after the tie coat is hard dry, otherwise the effectiveness of sealing pinholes will be reduced. 4. Excessive thinning will reduce sag resistance and slow curing. 5. Over-application will seriously affect drying and curing, recoating performance and handling time. To obtain better coating performance, when the film thickness exceeds 200 µm, multiple coats shall be applied to improve coating density. Avoid one-time over-application at edges, corners, welds and similar parts of structural components; once these parts are over-applied, extend the recoating time of subsequent coats to ensure solvent evaporation from the coating, otherwise cracking may occur during service. 6. After long-term exposure, if chalking occurs on the coating, clean with high-pressure water or abrade the surface before applying subsequent coatings. 7. Roller application cannot achieve high film thickness and a good continuous film in one coat; multiple coats are required. 8. During application and curing, the substrate temperature must be above 5°C and at least 3°C above the dew point, and the relative humidity must not exceed 85%. 9. Cutting structures coated with this coating generates fumes and dust; appropriate protection shall be provided. 10. When work is suspended, do not leave coating in paint lines, spray guns or spray equipment. Thoroughly flush all equipment with thinner. If the suspension is prolonged, it is recommended to mix a fresh batch of paint for application. 11. All equipment shall be cleaned with thinner immediately after use. Periodic flushing of spray equipment during the daily work process is good practice. Cleaning frequency depends on spray volume, temperature, spray time, including interruption time and other factors. 12. Residual paint and empty containers shall be disposed of in accordance with relevant regional regulations.

Packaging

Storage

Keep sealed in a ventilated, cool, dry place away from sources of ignition. Minimum 12 months.

Safety Precautions

1. For the coating and its recommended thinners, see the safety sheets and the safety data of the relevant materials. This is a solvent-borne coating; avoid inhaling spray mist and solvent vapours, and avoid exposing skin and eyes and contact with uncured paint as far as possible. 2. All work related to the application and use of this product must comply with the relevant national health, safety and environmental standards and regulations. 3. 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. 4. If in doubt about the suitability of this product, consult the company.

Scope of liability

The information provided in this product data sheet is based on laboratory test results that we consider accurate, and is provided for application guidance only. All recommendations and advice given by T&H on the use of T&H products, whether in technical documents, special consultation or otherwise, are based on information we consider most reliable. Our products and the information provided are intended for users with the necessary knowledge and industrial experience, and it is for these end users to determine whether the products are suitable for their use. T&H cannot control the quality and condition of the substrate, nor the various factors affecting the use of the product. Therefore, T&H accepts no liability for any loss, injury or damage arising from the use of our products or from reliance on this product data sheet (unless otherwise agreed in writing). Data in this product data sheet may be revised as necessary based on practical experience and continued product development.

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.