Epoxy High-build Coating XH4220 belongs to epoxy coatings. Mainly used for the corrosion protection of the external walls of buried pipelines in soil environments with pH 4–8, replacing epoxy coal tar pitch anti-corrosion coatings in applications with stringent environmental requirements. Parameters on this page: volume solids 81 ± 2%, dry film thickness 50/150/200 µm, theoretical spreading rate 4 m²/L.
Parameter source: T&H original technical data sheet (TDS) for Epoxy Mastic XH4220; spreading rate and other values are converted from TDS parameters and provided for product selection reference only.
The above content is compiled from the manufacturer's datasheet and this site's parameter tables. For selection, coating systems and lead times, pleaseContact Usfor confirmation.
This page carries the full TDS for this product, translated from the manufacturer's original document. No file download is needed; for an original-language copy, send an enquiry.
| Volume Solids | 81 ± 2% |
|---|---|
| Dry Film Thickness | 50/150/200 µm |
| Theoretical Spreading Rate | 4 m2/L |
| VOC | 190g/L |
| Density / Specific Gravity | 1.45 kg/L |
| Number of Components | Two-component |
| Flash Point | 25°C |
| Thinner | 0-15% |
| Mixing Ratio | Base : curing agent = 6:1 (by weight), 78:22 (by volume) |
For more Q&A on selection, application, acceptance and defect diagnosis, seeFAQsection.
A high-solids high-build epoxy coating, free of harmful substances such as coal tar and pitch. Mainly used for anti-corrosion protection of the external wall of buried pipelines in soil environments with pH 4–8, replacing epoxy coal tar pitch anti-corrosion coatings in applications with stringent environmental requirements.
| Colour | Brown-black, aluminium grey |
|---|---|
| Gloss | N/A |
| density | 1.45 kg/L |
| Volume Solids | 81±2% |
| Volatile Organic Compounds | 190g/L |
| Flash Point | 25°C |
| Mixing ratio | Base : curing agent = 6:1 (by weight), 78:22 (by volume) |
| Typical dry film thickness | 200µm |
|---|---|
| Recommended dry film thickness | 200–600 µm, according to system requirements |
| Induction time (20 °C) | 10-15min |
| Thinner quantity (by volume) | Airless spray 0–10% | Air spray / | Roller or brush 0–15% |
| Recommended nozzle size | 0.43~0.64mm | / | None |
| Recommended spray pressure | 15~20MPa | / | None |
| Application suitability | Recommended | / | Suitable for small-area repair |
| Dry film thickness (µm) | 50 | 150 | 200 |
| Wet film thickness (µm) | 63 | 188 | 250 |
| Theoretical spreading rate (m²/L) | 16.2 | 5.3 | 4 |
| Temperature | Surface Dry | Hard Dry | Pot Life | Recoat interval | |
| Minimum | Maximum* | ||||
| 5°C | 4h | 24h | 4h | 24h | |
| 15°C | 3h | 20h | 3h | 24h | / |
| 25°C | 1.5h | 12h | 1.5h | 12h | |
| 40°C | 1h | 6h | 40min | 8h | |
*The maximum recoat interval depends on the exposure environment and the end use of the coating.
All surfaces to be coated shall be clean, dry and free from contaminants. Prior to coating, all surfaces shall be assessed and prepared in accordance with ISO 8504:2000. On coating film surfaces already coated with this product, areas with mechanical damage and local rusting shall be locally abrasive blast cleaned to Sa2½ or power tool cleaned to St3 before local repair. When coating over other existing coatings, appropriate methods shall be used to remove chalking, zinc salts, grease and other contaminants from the surface. When coating over inorganic zinc silicate primer or sprayed metal surfaces, an approved tie-coat or intermediate coat shall be used.
1. During application, ensure ventilation, exhaust, keep away from ignition sources, and wear masks, gloves and other protective equipment; maintain adequate ventilation during curing. 2. When mixing paint, first stir the main agent uniformly, then add the curing agent in the specified ratio and mix uniformly; adjust the amount of thinner according to application requirements and temperature changes, stir thoroughly and induce. 3. When applied over inorganic zinc silicate coatings, seal with a tie coat; apply this product only after the tie coat is hard dry, otherwise the effectiveness of pinhole sealing will be reduced. 4. Excessive thinning will reduce sag resistance and slow curing. 5. Excessive film thickness will seriously affect drying and curing, recoatability and handling time. To achieve better coating performance, when the film thickness exceeds 200 µm, apply multiple coats to improve coating density. Avoid excessive single-coat application at edges, corners, welds and other parts of structural components; once these parts are coated too thick, extend the recoat 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 a single 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%. Good performance is obtained only after the film is fully cured; the degree of curing depends on temperature, humidity, film thickness and other factors. Do not apply this product when the air temperature is below 5 °C. 9. In strongly acidic and strongly alkaline soils, this product is not suitable as a substitute for conventional epoxy coal tar asphalt coatings. 10. Cutting structures coated with this coating generates smoke and dust; take appropriate protective measures. 11. When work is suspended, do not leave paint in paint lines, spray guns or spray equipment. Flush all equipment thoroughly with thinner. If the suspension is prolonged, it is recommended to mix a fresh batch of paint for application. 12. All equipment should be cleaned with thinner immediately after use. Periodic flushing of spray equipment during the daily work process is a good practice. Cleaning frequency depends on spray volume, temperature, spray time, including interruption time and other factors. 13. Residual paint and empty cans should be disposed of in accordance with relevant local regulations.
| 21 kg per unit | Base 18 kg | Curing agent 3 kg |
| 14.5 L per unit | Base 11.4 L | Hardener 3.1 L |
Keep sealed in a ventilated, cool, dry place away from sources of ignition. Minimum 12 months.
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.
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.
Packaging specifications and batch lead times are subject to actual availability. PleaseContact Uscontact us for project-based calculation.
