Hempel Heat-resistant Coating under Insulation 56990 belongs to Thermal Insulation Coatings. This product is specifically developed for the prevention of corrosion under insulation (CUI) and can be applied directly to steel substrates or zinc silicate primer. Complies with NACE SP0198 - 2017 Systems SS-5, CS-6 and CS-8. Parameters on this page: volume solids 76 ± 2%, dry film thickness 150 µm, theoretical spreading rate 5 m²/L. Comparable models from the same brand: Hempel Heat-resistant Coating under Insulation 275, Hempel Aerogel Thermal Insulation Coating 170, Hempel Aerogel Thermal Insulation Coating 175.
Parameter source: HEMPEL original technical data sheet (TDS) “Hempel Heat-resistant Coating under Insulation 56990”; 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 | 76 ± 2% |
|---|---|
| Dry Film Thickness | 150 µm |
| Theoretical Spreading Rate | 5 m²/L |
| VOC | 367 g/L (China) |
| Density / Specific Gravity | — |
| Number of Components | — |
| Flash Point | 25°C |
| Thinner | HEMPEL's Thinner 08080 |
| Colour / Appearance | Metallic dark grey 10710 * |
For more Q&A on selection, application, acceptance and defect diagnosis, seeFAQsection.
56990
Hempel Heat-resistant Coating under Insulation 56990 is an MIO-tinted, fibre-reinforced inorganic copolymer coating that cures to form an inert multi-polymeric matrix (IMPM) and withstands temperatures and thermal shock/cycling up to 650°C [1200°F] in dry service or dry/wet service.
Complies with NACE SP0198 - 2017 Systems SS-5, CS-6 and CS-8. Approved under SaudiAramco APCS-11C.
Hempel Heat-resistant Coating under Insulation 56990 is recommended for long-term protection of hot pipes, equipment and other hot surfaces. This product is specifically developed for the prevention of corrosion under insulation (CUI) and can be applied directly to steel substrates or zinc silicate primer.
- Dry conditions or alternating dry/wet conditions: from -196°C [-321°F] to 650°C [1202°F].
- Tested and evaluated according to NACE TM0174; standard test method for evaluating protective coatings for entry into service. Resistance to boiling tap water, Method B.
- Tested and evaluated according to the standard "Fire tests on building materials and structures"; flammability test method BS 476-5.
- Tested and evaluated according to the standard "Fire tests on building materials and structures"; determination of surface spread of flame of products, BS 476-7.
- Capable of withstanding temperatures and thermal shock/cycling up to 650°C [1200°F] in dry or dry/wet service.
| Product safety | Flash point 25 °C |
|---|
| Regulations | Value |
| European Union | 367 g/L |
| USA (coatings) | 366 g/L |
| USA (regulatory) | 366 g/L |
| Canada | 366 g/L |
| China | 367 g/L |
| Hong Kong | 366 g/L |
| South Korea | 367 g/L |
For specific legislation, refer to the explanatory notes provided on the Hempel website hempel.com or the local Hempel website. Measured in accordance with GB/T 23985-2009. The volatile organic compound (VOC) value may vary depending on the colour shade; refer to Section 9 of the Safety Data Sheet. This product complies with the VOC requirements specified in national mandatory or national recommended standards; consult a company representative for details.
Handle with care. Before and during use, observe the safety labels on the packaging and paint containers and comply with all local and national safety regulations. Consult the Hempel Safety Data Sheet and Product Data Sheet for the product at all times.
For professional use only.
| Product code | 56990 |
|---|
_______________________________
| Standard colour / code | Metallic dark grey 10710 * |
|---|---|
| Gloss | Flat |
| Volume solids | 76 ± 2% |
1.9 kg/L56990
| Recommended dry film thickness | 150 µm |
|---|
Pearl Light Grey / Pearl Grey 19360
Refer to the Hempel Guide for Aluminium-containing Coatings.
| Volume solids | 72 ± 2% |
|---|
1.8 kg/L
| Recommended dry film thickness | 150 µm |
|---|
- Abrasive blast clean to Sa 2½ (ISO 8501-1) / SP 10 (SSPC) / NACE No.2 minimum.
- Stainless steel, aluminium and other non-ferrous metals and alloys: use a non-metallic blast medium (e.g. corundum, garnet).
- Clean thoroughly by hand or power tools to St 3 (ISO 8501-1) / SP 3 (SSPC). Avoid polishing.
For further details, refer to the separate Hempel document Surface Preparation Guide.
Stir thoroughly before use.
| Thinner | HEMPEL's Thinner 08080 |
|---|---|
| Cleaning solvent | HEMPEL's Tool Cleaner 99610 |
HEMPEL's Thinner 08080
| Tools | Maximum thinning volume | Application parameters |
| Airless Spray | 5% | Nozzle pressure: 17.5 MPa; nozzle size: 0.43–0.53 mm |
| Air Spray | 5% | - |
| Brush | 5% | - |
If brush or roller application is used, several coats may be required to achieve the specified dry film thickness. Spray parameters are indicative and may be adjusted to suit site conditions. Pressure figures apply to the material at 20 °C. (*For other application methods, consult the company representative.)
| Specification range | Low | High | Recommended |
| Dry Film Thickness | 100 µm | 225 µm | 150 µm |
| Wet Film Thickness | 132 µm | 297 µm | 198 µm |
| Theoretical Spreading Rate | 7.6 m²/L | 3.4 m²/L | 5 m²/L |
56990
- If the temperature does not exceed 204 °C (400 °F) before or during use, refer to the Hempel technical guide or contact Hempel.
| Surface temperature | 10°C | 20°C | 30°C | 40°C |
| Touch Dry | 90 min | 45 | 30 | |
| Hard Dry | 4 h | 2 | 1½ | |
Measured at 150 µm dry film thickness under standard conditions; see Hempel's explanatory notes.
Hempel's specifications supersede all guidance shown in the recoat table.
| Product name | 10°C | 20°C | 30°C | 40°C | |
| Atmospheric, severe | |||||
|---|---|---|---|---|---|
| Hempel Corrosion Under Insulation Coating 56990 | Minimum | 18 h | 6 h | 3 h | 2½ h |
| Maximum | Extendable* | ||||
Extendable* Depending on the actual exposure conditions, the coated surface may be recoated after an extended time. Contact your local Hempel representative for advice.
For further information, refer to Hempel's specifications.
- To achieve the stated drying times, adequate ventilation during application, drying and curing is essential.
- When recoating Hempel Corrosion Under Insulation Coating 56990 itself, apply multiple thin coats to reduce the risk of coating blistering/pinholes.
| Ambient temperature | 25°C |
|---|---|
| Product | 12 months |
When stored in unopened original containers, shelf life is counted from the date of production. Thereafter, the product quality must be re-inspected. Storage at high temperatures may shorten the shelf life. The shelf life stated on the product label is determined according to local climatic conditions. For advice, consult Hempel.
- Store the product in accordance with the Safety Data Sheet, label and local regulations. Keep containers in a dry, cool, well-ventilated place away from heat and sources of ignition. Keep containers tightly closed. Handle with care.
| Dry Film Thickness | 1 µm | |
| GWP (Global Warming Potential) | 7.1 g CO₂e/m² |
Carbon footprint is based on a 1 µm dry film thickness formed over a surface area of 1 m².
The scope includes raw materials, transport to the Hempel factory, the Hempel production process, and any volatile organic compounds (VOC) emitted during and after use of the product.
56990
More information is available at the Knowledge Centre: https://www.hempel.com/knowledge-center. The following documents are in the “Technical Guidelines” section:
https://www.hempel.com/knowledge-center/technical-guidelines Hempel
| Number | Document description | Location/Notes |
| 3. | PDS | This document |
datasheet, which is also available for download at www.hempel.com.
This Product Data Sheet (“PDS”) relates to the product supplied (the “Product”), and its content is updated from time to time. Accordingly, the buyer/applicator should refer to the PDS supplied with the relevant batch of product (rather than an earlier version). In addition to the PDS, the buyer/applicator may receive some or all of the specifications, declarations and/or guides shown below, which are also available for download from the “Products” page of the Hempel website (www.hempel.com) (hereinafter the “Supplementary Documents”):
| 1. | Technical declaration | Provides one-off specific advice for the requirements of a specific project |
| 2. | Specifications | Issued for specific projects only |
| 4. | Explanatory notes to the PDS | Available for download at www.hempel.com, containing information related to product test parameters |
| 5. | Application guide | If available, provided at www.hempel.com |
| 6. | General technical guidelines (e.g. application and surface preparation) |
If the information in the PDS and the supplementary documents is inconsistent, the information shall take precedence in the order listed above. In this case, contact the Hempel representative for clarification. In addition, the buyer/applicator must give full consideration to the relevant safety information accompanying each product. Hempel accepts no liability for any defects arising from application not carried out fully in accordance with the recommendations and requirements of the relevant PDS and supplementary documents. The information and terms in this disclaimer apply to this PDS, the supplementary documents and any other relevant documents provided by Hempel for this product. In addition, unless otherwise expressly agreed in writing, supply of the product and all technical support are subject to Hempel's General Conditions of Sale, Delivery and Service.
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.
