Silicone Heat-resistant Zinc Dust Primer XH7627 belongs to Heat-resistant, silicone paint system. Suitable for heat-resistant anticorrosive protection of high-temperature pipelines, equipment and exhaust devices in petrochemical plants, chemical plants, power plants and steel plants; metallic zinc content of the dry film greater than 70%. Parameters on this page: volume solids 52 ± 2%, dry film thickness 40/50/60 µm, theoretical spreading rate 8.7 m²/L.
Parameter source: T&H original technical data sheet (TDS) "Silicone Heat-resistant Zinc-rich Primer XH7627"; values such as spreading rate are converted from TDS parameters and are for 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 | 52 ± 2% |
|---|---|
| Dry Film Thickness | 40/50/60 µm |
| Theoretical Spreading Rate | 8.7 m2/L |
| VOC | 430g/L |
| Density / Specific Gravity | 2.5kg/L |
| Number of Components | Three-component |
| Flash Point | 25°C |
| Thinner | 0-10% |
| Mixing Ratio | Base : zinc dust : accelerator = 100:200:1.4 (by weight) |
For more Q&A on selection, application, acceptance and defect diagnosis, seeFAQsection.
The product is composed of high-silicone-content silicone resin, heat-resistant pigments (fillers), zinc dust, additives, solvents and accelerator. Long-term heat resistance temperature 400°C; when a thin coating is used with a silicone aluminium-pigmented paint, maximum heat resistance temperature 540°C. Suitable for heat-resistant anticorrosive protection of high-temperature pipelines, equipment and exhaust devices in petrochemical plants, chemical plants, power plants and steel plants; metallic zinc content of the dry film greater than 70%.
| Colour | Zinc grey |
|---|---|
| Gloss | N/A |
| density | 2.5kg/L |
| Volume Solids | 52±2% |
| Volatile Organic Compounds | 430g/L |
| Flash Point | 25°C |
| Mixing ratio | Base : zinc dust : accelerator = 100:200:1.4 (by weight) |
| 75:24:1 | (by volume) |
| Typical dry film thickness | 40µm |
|---|---|
| Recommended dry film thickness | 40–80 (40×2) µm, the coating thickness depending on the design temperature of the installation and the protection requirements of the system. |
| Induction time (20 °C) | 10~15min |
| Thinner quantity (by volume) | Airless spray* 0–5% | Air spray 5–20% | Roller or brush 0–10% |
| Recommended nozzle size | 0.38~0.43mm | 1.5~2.5mm | None |
| Recommended spray pressure | 15~20MPa | 0.3~0.6MPa | None |
| Application suitability | Applicable | Recommended | Applicable |
*For long-term heat resistance above 400 °C, strictly control the film thickness during application.
| Dry film thickness (µm) | 40 | 50 | 60 |
| Wet film thickness (µm) | 77 | 96 | 115 |
| Theoretical spreading rate (m²/L) | 13 | 10.4 | 8.7 |
| Temperature | Surface Dry | Hard Dry | Pot Life | Recoat interval | |
| Minimum | Maximum* | ||||
| 5°C | 2h | 24h | 4h | 48h | |
| 15°C | 1h | 12h | 3h | 24h | / |
| 25°C | 0.5h | 6h | 2h | 24h | |
| 40°C | 15min | 4h | 1.5h | 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. The product is suitable for application over metal substrates prepared to Sa2½ or St3. When applied over inorganic zinc silicate primers or old coats of this product, chalk, grease and other contaminants shall be removed by appropriate methods. In cracked or damaged areas, the substrate shall be prepared to Sa2½ or St3 before applying the product.
1. Ensure ventilation and exhaust during application, 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 slowly add the zinc dust component and accelerator with stirring in the specified ratio and stir thoroughly; adjust the thinner amount according to application needs and temperature changes and mix well. Filter the mixed paint through a mesh before use and stir at regular intervals during application to prevent zinc dust settling. As the mixing ratio is large, use a weighing device when small batches are prepared; volumetric measurement cannot proportion the paint accurately by volume. 3. The coating cannot achieve the desired physical and mechanical properties before heat exposure for secondary curing; handle with particular care during transport to avoid damage to the coating. The film may show slight discolouration and yellowing under prolonged high temperature. 4. Excessive film thickness or too short a recoat interval will seriously affect drying and curing, heat resistance, recoatability and handling time. At a design maximum temperature of 400°C the maximum film thickness is 90 µm; above 420°C the maximum film thickness is 60 µm, and the product shall be used with another suitable heat-resistant topcoat. A typical system is with a silicone aluminium-pigmented topcoat, in which the product coating thickness is controlled at 40–60 µm, the silicone aluminium-pigmented topcoat at 30–50 µm, total film thickness not exceeding 90 µm, maximum heat resistance temperature 540°C. 5. After prolonged exposure of the coating, ensure the old film surface is free from contaminants and abrade the surface before applying subsequent coats. 6. Thick films of this product shall be fully dried and cured for at least 7 days before being placed in service; otherwise the incompletely cured coating cannot achieve good heat resistance, and the film may peel or flake during heating. 7. During application and curing, substrate temperature shall be above 5°C and at least 3°C above dew point; relative humidity shall not exceed 85%. Avoid application on surfaces above 40°C, otherwise defects such as blistering and poor flow may occur. 8. Cutting structures coated with this paint generates fume and dust; provide suitable protection. 9. When work is suspended, do not leave paint in the paint line, spray gun or spray equipment. Flush all equipment thoroughly with thinner. If the suspension is prolonged, prepare a fresh mix of paint for application. 10. Clean all equipment with thinner immediately after use. Flushing spray equipment at regular intervals during the working day is good practice. Cleaning frequency depends on spray volume, temperature, spraying time and interruption time. 11. Residual paint and empty containers shall be disposed of in accordance with applicable local regulations.
| 20.2 kg per kit | Base 6.7 kg | Zinc dust 13.4 kg | Accelerator 0.1 kg |
| 8 L per kit | Base 6 L | Zinc dust 1.9 L | Accelerator 0.1 L |
Store sealed in a ventilated, cool, dry place away from ignition sources. Base minimum 12 months; zinc dust and accelerator 6 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.
