Interchar 963 "I" provides fire protection for I-section beams, columns and hollow sections; it is a fire protection coating. Because of its fast drying and fast recoating, Interchar 963 is suitable for application in fabrication shops and can be applied over a range of approved primers. A one-component, solvent-borne, high-solids intumescent coating, independently tested on steel structures in accredited laboratories to a range of standards (see Product Characteristics), achieving 2-hour fire protection. Ideal application/drying conditions: ambient and surface temperatures above 5 °C (41 °F), relative humidity below 85%. Parameters on this page: volume solids 75% ± 2%; dry film thickness 350–750 µm (14–30 mils); theoretical spreading rate 1 m²/L.
Source: AKZONOBEL original technical data sheet (TDS) 'Interchar 963 "I" for I-beams, columns and hollow sections fire protection'. Spreading rate and other values converted from the TDS; for 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 | 75% ± 2% |
|---|---|
| Dry Film Thickness | 350–750 µm (14–30 mils) |
| Theoretical Spreading Rate | 1 m²/L |
| VOC | 2.71 lb/gal (325 g/L), US EPA Method 24, 23… |
| Density / Specific Gravity | 1.37 kg/L (11.4 lb/gal) |
| Number of Components | One-component |
| Flash Point | 5°C (41°F) |
| Thinner | Generally not required |
| Mixing Ratio | N/A |
For more Q&A on selection, application, acceptance and defect diagnosis, seeFAQsection.
A one-component, solvent-borne, high-solids intumescent coating, independently tested on steel structures in accredited laboratories to a range of standards (see Product Characteristics), achieving 2-hour fire protection.
Provides fire protection for I-section beams, columns and hollow sections. Because of its fast drying and fast recoating, Interchar 963 is suitable for application in fabrication shops and can be applied over a range of approved primers.
| Colour | INTERCHAR 963, colours: white, grey |
|---|---|
| Gloss | Matt |
| Volume Solids | 75% ± 2% (measured per ISO 3233 and the ICF method) |
| Typical thickness | Dry film thickness 350–750 µm (14–30 mils), equivalent to wet film thickness 467–1000 µm (18.7–40 mils); typical thickness achievable in a single coat |
| Theoretical Spreading Rate | 1 m²/L at 750 µm dry film thickness and the stated volume solids; 40 ft²/US gal at 30 mil dry film thickness and the stated volume solids |
| Practical Spreading Rate | Allowing for a suitable loss factor |
| Application Methods | Suitable for airless spray and brush. Drying time: self-overcoating interval |
| Temperature | Surface Dry | Hard Dry | Minimum | Maximum |
| 10°C (50°F) | 60 min | 24 h | 8 h² | Unlimited¹ |
| 15°C (59°F) | 45 min | 20 h | 6 h² | Unlimited¹ |
| 25°C (77°F) | 30 min | 16 h | 4 h² | Unlimited¹ |
¹ See 'Definitions and Abbreviations' of International Protective Coatings. ² After the final coat of Interchar 963 has been applied and reached the required cure, apply the sealer as soon as possible (at least 2–4 hours for Intersheen 579, 24 hours for Interthane 870 and Interthane 990; refer to the application procedure or consult International Paint technical staff). Note: check the dry film thickness to ensure the specified thickness is reached before applying the sealer.
All drying time data refer to a typical dry film thickness of 750 µm (30 mil).
If the temperature is 25 °C (77 °F) or above, use the tropical grade. See 'Product Characteristics'.
| Flash point (typical) | 5°C (41°F) |
|---|---|
| Product weight | 1.37 kg/L (11.4 lb/gal) |
| Volatile Organic Compounds | 2.71 lb/gal (325 g/L), US EPA Method 24; 237 g/kg, EU Solvent Emissions Directive (Commission Directive 1999/13) |
All surfaces to be coated must be clean, dry and free of contaminants. Before application, all surfaces must be assessed and prepared in accordance with ISO 8504:2000.
Oil and grease must be removed in accordance with the SSPC-SP1 solvent cleaning standard.
Primed surfaces: Interchar 963 should always be applied over a recommended anti-corrosive paint. The primer surface should have a normal appearance, be dry and free of contaminants, and Interchar 963 must be applied within the specified recoat interval (refer to the relevant product data sheet).
Damaged areas should be prepared to the specified standard (e.g. Sa 2½ (ISO 8501-1:2007) or SSPC SP6 abrasive blasting, or SSPC SP11 power tool cleaning), and the primer repaired before applying Interchar 963.
Zinc-primed substrates: Interchar 963 can be applied over approved epoxy metallic zinc primers. Before applying Interchar 963, ensure the primer surface is clean, dry, uncontaminated and free of zinc salts. Ensure the zinc primer is fully cured before recoating. A tie coat such as Intergard 269 or Intergard 276 is recommended to prevent zinc salt build-up.
| Mixing | This product is a single-component coating; stir thoroughly with a power mixer before each use |
|---|---|
| Mixing ratio | N/A |
| Suitable for airless spray | Recommended nozzle tip 0.48–0.59 mm (19–23 thousandths of an inch); total paint pressure at the nozzle not less than 246 kg/cm² (3498 lb/in²) |
| Air Spray | Not recommended (with pressure pot) |
| Brush | Suitable for small areas and repair; multiple coats are required to achieve the dry film thickness. |
| Roller application | Not recommended |
| Thinner | Generally not required |
| Cleaner | International GTA007 |
| Interruption of work | Flush all equipment thoroughly with International GTA007. All unused paint must be stored in tightly closed containers. |
In partly filled containers, surface skinning and/or increased viscosity may occur after a period of storage.
| Cleaning | All equipment should be cleaned immediately after use with International GTA 007. Flushing spray equipment periodically during daily work is good practice. Cleaning frequency depends on the volume sprayed, temperature, spraying time, including delays, and other factors. |
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All surplus paint and empty containers must be disposed of in accordance with the relevant local laws/regulations.
Before use, refer to the detailed Interchar 963 application procedure.
Airless spray gives ideal results, achieving the required film thickness in one coat. Methods other than airless spray make it harder to reach the required thickness.
At low or high temperature, special application techniques may be required to reach maximum film thickness. Over-application of Interchar 963 extends the minimum recoat interval and handling time.
With brush application, multiple coats may be required to reach the specified total system dry film thickness.
Ideal application/drying conditions: ambient and surface temperatures above 5 °C (41 °F), relative humidity below 85%. The surface temperature must be at least 3 °C (5 °F) above the dew point.
When applying Interchar 963 in confined spaces, ensure adequate ventilation.
The final appearance of Interchar 963 depends on the application method. For visible areas, spray application is preferred. Additional treatment may be required for a highly decorative surface. The final surface appearance depends on the application method.
The Interchar 963 film (sealed or not) should be protected from standing and running water. Interchar 963 must not be used in areas subject to frequent immersion.
In outdoor conditions without standing water, running water or frequent high humidity, a more water-resistant version of Interchar 963 can be exposed for up to 6 months without a sealer for corrosion protection.
Tropical version: to improve application performance in hotter climates, the tropical version can be used. Interchar 963 tropical has the following properties: volume solids 73% ± 2%; VOC 350 g/L; flash point 26 °C (79 °F).
Drying time: recommended topcoat recoat time
| Temperature | Surface Dry | Hard Dry | >Minimum | Maximum |
| 25°C (77°F) | 2 h | 36 h | 16 h² | Unlimited¹ |
| 40°C (104°F) | 1 h | 24 h | 12 h² | Unlimited¹ |
1 See 'Definitions and Abbreviations' of International Protective Coatings. 2 The sealer should be applied immediately after the final coat of Interchar 963 (minimum 2–4 hours for Intersheen 579;
| minimum 24 hours for Interthane and Interfine series). | However, before applying the sealer, ensure the dry film thickness has been checked and reached the required thickness. |
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Interchar 963 has been tested for use as part of a coating system over various approved primers in fire situations.
The following primers are approved for use with Interchar 963
| Intercure 200 | Intercure 200HS |
|---|---|
| Intergard 251 | Intergard 269 |
| Interplate 398 | Interprime 306 |
| Interseal 670HS | Interseal 1052 |
| Interzinc 42 | Interzinc 52. The following topcoats are approved for use with Interchar 963 |
| Intersheen 579 | Interfine 878 |
| Interthane 870 | Interthane 990, Interthane 990SG topcoats. If a polysiloxane coating is required, a tie coat must be applied over the Interchar 963 film. For further advice, contact International Protective Coatings. |
| For further information on the industry standards, terms and abbreviations used in this datasheet, see www.international-pc.com | in the following documents available on the website: • Definitions and abbreviations • Surface preparation • Coating application • Theoretical and practical spreading rates • Interchar application manual |
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This product must be applied at the production site by professional applicators in accordance with the recommendations in this manual, the Material Safety Data Sheet and the instructions on the container label. Do not use this product without first reviewing the Material Safety Data Sheet (MSDS) that International Paint provides for its customers.
All work related to the application and use of this product must be carried out in accordance with the relevant national health, safety and environmental standards and regulations.
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.
If in doubt about the suitability of this product, consult AkzoNobel Protective Coatings for further advice.
| Packaging Specifications | ||
| Volume | Packaging | |
| 20 L | 20 L | |
| 5 US gal | 5 US gal |
For other packaging sizes, contact AkzoNobel Protective Coatings.
Packaging Specifications
| 20 L | 29.2 kg |
|---|---|
| 5 US gal | 60.5 lb |
| Shelf life | At least 12 months at 25 °C (77 °F). Thereafter, inspection is required. Store in a dry, cool environment away from heat and sources of ignition. |
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The information given in this product data sheet is not exhaustive. Anyone who uses, for any purpose, any product other than those specifically recommended in this data sheet without first obtaining our written confirmation does so at their own risk as regards the suitability of the product for the intended purpose. Although to the best of our knowledge all advice or statements given about the product (whether in this data sheet or otherwise) are correct, we cannot control the quality or condition of the substrate, nor the many factors affecting the use and application of the product. Accordingly, unless we specifically agree otherwise in writing, we accept no liability, to the maximum extent permitted by law, for any product performance problem arising, or for any loss or damage caused by use of the product. We hereby disclaim any warranty or representation, express or implied, arising by operation of law or otherwise, including but not limited to any implied warranty of merchantability or fitness for a particular purpose. All products supplied and all technical guidance provided are subject to our standard terms and conditions of sale. You should obtain a copy of this document and read it carefully. The information contained in this product data sheet may be amended at any time in the light of experience and of our product development policy. Before using the product, it is the customer's responsibility to check with the local representative that the data sheet in their possession is the latest version.
This product data sheet is available on www.international-marine.com or www.international-pc.com and should be identical to this copy. If the version on the website differs from this one, the version on the website shall prevail.
© 2020/7/17 AkzoNobel. All rights reserved.
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Data is subject to the manufacturer's latest version; in all cases the manufacturer's latest TDS prevails.
Packaging specifications and batch lead times are subject to actual availability. PleaseContact Uscontact us for project-based calculation.
