Inorganic Zinc-rich Primer XH4008L is a zinc-rich primer. It is used for the protection of steel facilities and equipment, high-temperature pipelines, bridges, storage tanks, etc. in severe atmospheric corrosion environments. Parameters on this page: volume solids 42 ± 2%, dry film thickness 60/80/100 µm, theoretical spreading rate 4.2 m²/L.
Parameter source: T&H manufacturer's Technical Data Sheet (TDS) "Inorganic Zinc-rich Primer XH4008L"; spreading rate and other values are converted from the 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 | 42 ± 2% |
|---|---|
| Dry Film Thickness | 60/80/100 µm |
| Theoretical Spreading Rate | 4.2 m2/L |
| VOC | — |
| Density / Specific Gravity | 2.2kg/L |
| Number of Components | Two-component |
| Flash Point | 17°C |
| Thinner | 5-15% |
| Mixing Ratio | Base : curing agent = 5.6:1 (by weight), 65:35 (by volume) |
For more Q&A on selection, application, acceptance and defect diagnosis, seeFAQsection.
Two-component solvent-borne inorganic zinc silicate coating; performance and composition comply with HG/T3668 standard requirements. Used for the protection of steel facilities and equipment, high-temperature pipelines, bridges, storage tanks, etc. in severe atmospheric corrosion environments.
| Colour | Zinc grey |
|---|---|
| Gloss | N/A |
| density | 2.2kg/L |
| Volume Solids | 42±2% |
| Flash Point | 17°C |
| Mixing ratio | Base : curing agent = 5.6:1 (by weight), 65:35 (by volume) |
| Typical dry film thickness | 60µm |
|---|---|
| Recommended dry film thickness | 50–100 µm, depending on system requirements |
| Induction time (20 °C) | No induction required |
| Thinner quantity (by volume) | Airless spray 0–15% | Air spray 5–20% | Roller or brush 5–15% |
| Recommended nozzle size | 0.43~0.64mm | 2.0~3.0mm | / |
| Recommended spray pressure | 15~20MPa | 0.3~0.6MPa | / |
| Application suitability | Recommended | Applicable | Suitable for small-area repair |
*For low-temperature application and where fast hard drying is required, use a fast thinner.
| Dry film thickness (µm) | 60 | 80 | 100 |
| Wet film thickness (µm) | 143 | 190 | 238 |
| Theoretical spreading rate (m²/L) | 7.0 | 5.3 | 4.2 |
Application data (typical dry film thickness 60 µm, 65% relative humidity):
| Temperature | Surface Dry | Hard Dry | Pot Life | Recoat interval | |
| Minimum | Maximum* | ||||
| 5°C | 60min | 12h | 8h | 48h | / |
| 15°C | 60min | 6h | 48h | / | |
| 25°C | 30min | 4h | 5h | 24h | / |
| 40°C | 30min | 2h | 3h | 24h | / |
*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 contamination. Before application, all surfaces shall be assessed and prepared in accordance with ISO 8504:2000. Blast clean 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 of the primer. If the old film shows chalking or zinc salts, remove the zinc salts and contamination before applying other primers, intermediate coats or topcoats.
1. During application, ensure ventilation and exhaust, keep away from ignition sources, and wear protective equipment such as masks and gloves. Maintain appropriate ventilation during curing. 2. Stir the zinc dust slurry uniformly with a power tool, add the curing agent and mix thoroughly. Adjust the amount of thinner according to application requirements and temperature changes, and mix thoroughly. It is recommended to filter through a 120-mesh screen before use and to maintain continuous stirring during use. 3. The maximum permitted dry film thickness for this product is 120 µm; excessive thickness may cause cracking. During application, pay attention to the treatment of edges and corners of the coated structure and avoid excessive thickness to prevent cracking. 4. This product is only suitable for application on blast-cleaned steel surfaces and inorganic zinc silicate coating surfaces; it must not be applied over other types of coatings. Substrates with excessively low roughness or smooth surface coatings cannot achieve good adhesion and may even detach. 5. 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%. Temperature and relative humidity must be measured at the substrate near the work area. Maintain good ventilation in the application environment, with relative humidity not less than 60%. If the humidity is below 60% during actual application, water spraying for humidification is required, and before recoating, evaluate the degree of cure in accordance with ASTM D4752, achieving at least grade 4. In low-humidity and low-temperature seasons, a fast-drying curing agent may be used. 6. When the product is used alone in systems resistant to oils, solvents, and chemicals, the coating thickness shall not exceed 90 µm. The permissible pH range of the medium is 6–9. Evaluate the degree of cure in accordance with ASTM D4752, achieving grade 5. 7. Cutting structures coated with this paint generates smoke and dust; appropriate protection shall be provided. 8. When applying other coatings over this product's coating, a sealing treatment shall be performed in advance. A dedicated sealer primer is recommended; alternatively, the subsequent epoxy coating may be thinned and mist-sprayed for sealing to prevent blistering. Alkyd, alkyd-modified, polyurethane coatings, etc., must not be applied directly over this product's coating. 9. When work is paused, do not leave paint in the paint hose, spray gun, or spray equipment. Thoroughly flush all equipment with thinner. If the pause is prolonged, it is recommended to mix a fresh batch of paint for application. 10. All equipment shall be cleaned with thinner immediately after use. Periodically flushing spray equipment during daily work is a good practice. Cleaning frequency depends on spray volume, temperature, spray duration, including interruption time, and other factors. 11. Residual paint and empty cans shall be disposed of in accordance with relevant regional regulations.
| 31.7 kg per unit | Main agent 26.9 kg | Curing agent 4.8 kg |
| 14.5 L per unit | Main agent 9.5 L | Curing agent 5 L |
Keep sealed in a ventilated, cool, dry place away from sources of ignition. Minimum 9 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.
