Epoxy Mastic XH4067-6060

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Product Description

A high-solids, high-build epoxy intermediate coat containing micaceous iron oxide pigment. Under severe atmospheric corrosion, it may be used as an intermediate coat in new construction or maintenance to improve the barrier protection of various anticorrosive systems.

Product Characteristics

• This product is for use as an intermediate coat only
• Good sag resistance, allowing a high dry film thickness in one coat
• Good barrier protection
• 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

*In hot seasons, the slow-drying thinner XH9400S is recommended

Theoretical Spreading Rate

Application data (typical dry film thickness 200 µm)

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

Surface Preparation

All surfaces to be coated shall be clean, dry and free from contamination. Before application, all surfaces shall be assessed and prepared in accordance with ISO 8504:2000. When used as a primer, the substrate shall be blast-cleaned to Sa2½ with a surface profile of 40–75 µm. Before derusting, remove all oil, grease and weld spatter, and grind welds and sharp edges. Where the coating film has suffered mechanical damage with localised rusting, spot blast to Sa2½ or power-tool clean to St3 before local repair. When applied over existing coatings, remove chalk, zinc salts, grease and other contaminants by appropriate methods. When applied over inorganic zinc silicate primers or metal spray, an approved tie-coat or intermediate coat shall be used.

Precautions

1. During application, ensure ventilation and 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 thoroughly, then add the hardener in the specified ratio and mix evenly; adjust the thinner quantity according to application needs and temperature, mix thoroughly and allow induction. 3. When overcoating inorganic zinc silicate coatings, seal with a transition coat first; apply this product only after the transition coat is hard-dry, otherwise the sealing of pinholes will be less effective. 4. Excessive thinning reduces sag resistance and slows curing. 5. Excessive film thickness adversely affects drying/curing, recoating and handling time. For better coating performance, when the film thickness exceeds 200 µm, apply in multiple coats to improve film density. Avoid a single over-thick coat on edges, corners and welds; if over-thick, extend the recoat interval for subsequent coats to allow solvent release, otherwise the coating may crack in service. 6. If the coating chalks after long-term exposure, wash with high-pressure water or abrade the surface before applying subsequent coats. 7. Roller application cannot achieve high film thickness and a continuous film in one pass; 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 relative humidity must not exceed 85%. 9. In steel structure shops requiring fast recoating, the fast-drying hardener can be used below 20 °C. In other anticorrosive maintenance work, the fast-drying hardener can be used below 15 °C. Above 20 °C, the fast-drying hardener is not recommended as the pot life is shortened. If it must still be used as the temperature rises, allow for the shortened pot life or switch to the general-purpose hardener. 10. Cutting structures coated with this product produces fumes and dust; take appropriate protection. 11. During work breaks, do not leave paint in the hose, spray gun or spray equipment. Flush all equipment thoroughly with thinner. If the break is too long, mix a fresh batch of paint for application. 12. Clean all equipment with thinner immediately after use. Flushing spray equipment regularly during work is good practice. Cleaning frequency depends on spray volume, temperature and spraying time including interruptions. 13. Dispose of leftover paint and empty cans in accordance with local regulations.

Packaging

Storage

Store sealed in a ventilated, cool, dry place away from ignition sources; ideal storage temperature 5–35 °C; minimum 12 months.

Safety Precautions

1. For the paint and recommended thinners, refer to the safety data sheet and related material safety data. This is a solvent-borne coating; avoid inhaling spray mist and solvent vapour, minimise skin and eye exposure, and avoid contact with wet paint. 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. Welding or flame cutting on metal coated with this product produces dust and fumes; 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.