Versiline CUI

PRODUCT DATASHEET

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PRODUCT CHARACTERISTICS

Recommended use

Versiline CUI 56990 is recommended for long term protection of hot pipework, equipment and other hot surfaces. The product is specially developed to prevent corrosion under insulation (CUI) and is applied directly onto the steel substrate or over a zinc silicate primer.

Service temperature

• From -196°C [-321°F] up to 650°C [1202°F] for dry or dry/wet exposure.

Certificates / Approvals

• Tested and assessed according to NACE TM0174; standard test method for evaluating protective coatings for immersion service. Resistance to Boiling Tap Water, Method B.
• Tested and assessed according to standard for Fire Test on Building Materials and Structures; method of test for ignitability BS 476-5.
• Tested and assessed according to standard for Fire Test on Building Materials and Structures; determination of the surface spread of flame of products BS 476-7.

Features

• MIO pigmented.
• Able to resist temperatures up to 650°C [1200°F] and thermal shock/cycling in dry or dry/wet service.
• Prevents corrosion under insulation (CUI).
• Applied directly onto the steel substrate or over a zinc silicate primer.

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PRODUCT SAFETY

Flash point

34°C [93°F]

VOC content

Legislation	Value
EU	371 g/L [3.10 lb/US gal]
US (coatings)	369 g/L [3.08 lb/US gal]
US (regulatory)	370 g/L [3.09 lb/US gal]
China	371 g/L [3.10 lb/US gal]

According to specific legislation, see details in the Explanatory Notes available at Hempel website, hempel.com or at your local Hempel website. Measured according to GB/T 23985-2009. VOC values may vary with shade, please consult the Safety Data Sheet, section 9.

Handling

Handle with care. Before and during use, observe safety labels on packaging and paint containers and follow all local and national safety regulations. Always consult Hempel’s Safety Data Sheet for this product along with the Product Data Sheet.

For professional use only.

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PRODUCT DATA

• Product code: 56990
• Standard shade / code: Metallic dark grey 10710 *
• Gloss: Flat
• Volume solids: 75 ± 2%
• Specific gravity: 1.9 kg/L [16 lb/US gal]
• Reference dry film thickness: 150 micron [6.0 mils]
• Aluminium shade / code: Pearl Light Grey 19360
• Gloss: Please consult Hempel’s Guideline on aluminium pigmented coatings.
• Volume solids: 70 ± 2%
• Specific gravity: 1.8 kg/L [15 lb/US gal]
• Reference dry film thickness: 150 micron [6.0 mils]

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SURFACE PREPARATION

Cleanliness

• Remove oil, grease and other contaminants by suitable detergent cleaning.
• Remove salts, detergents and other contaminants by high pressure fresh water cleaning.

New build

• Abrasive blasting to min. Sa 2½ (ISO 8501-1) / SP 10 (SSPC).
• Remove dust, blast media and loose materials.
• Stainless steel, aluminium and other non ferric metals and alloys: use non-metallic blast media (corundum, garnet, etc.).

Maintenance and Repair

• Spot abrasive blasting to min. PSa 2½ (ISO 8501-2) / SP 10 (SSPC).
• Water jetting to Wa 2½ (ISO 8501-4).
• Flash rust degree of maximum FR M (ISO 8501-4).
• Remove dust, blast media and loose materials.
• Abrasive blasting to min. Sa 2½ (ISO 8501-1) / SP 10 (SSPC).
• Minor areas can be cleaned by power tool to St 2 provided the surface is roughened and not polished.
• Clean thoroughly by hand or power tool to St 3 (ISO 8501-1) / SP 3 (SSPC). Avoid polishing.

Roughness

• Surface profile Medium (G) (ISO 8503-2).

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APPLICATION

Mixing ratio

Stir well before use.

Thinner

Hempel’s Thinner 08080

Cleaner

Hempel’s Thinner 08080
Hempel’s Tool Cleaner 99610

Application method

Tool	Thinning max vol.	Application parameters
Airless spray	10%	Nozzle pressure: 175 bar [2500 psi], Nozzle orifice: 0.017-0.021″
Air spray	10%	Not Applicable
Brush	5%	Not Applicable

If brush or roller application is used, more coats will be necessary to achieve the specified dry film thickness. Spray data are indicative and subject to adjustment. Pressure is for a material temperature of 20°C [68°F].

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FILM THICKNESS

	Low	High	Recommended
Dry film thickness	100 micron [4.0 mils]	225 micron [9.0 mils]	150 micron [6.0 mils]
Wet film thickness	133 micron [5.3 mils]	299 micron [12 mils]	199 micron [8.0 mils]
Theoretical spreading rate	7.5 m²/L [306 sq ft/US gal]	3.3 m²/L [134 sq ft/US gal]	5 m²/L [204 sq ft/US gal]

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APPLICATION CONDITIONS

• To avoid condensation, apply on a clean and dry surface with a temperature that is at least 3°C [5°F] above the dew point.
• Surface temperature must be above 10°C [50°F] during application and curing.
• Can be applied onto hot substrate up to maximum 200°C [392°F].
• For application onto hot substrate above 200°C [392°F], please contact Hempel.
• For service not exceeding 204°C (400°F) before or in operation, please review Hempel’s Technical Guidance or contact Hempel.

RELATIVE HUMIDITY

• Relative humidity must be below 85% during application.

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DRYING AND OVERCOATING

Product compatibility

• Previous coat: None or according to Hempel’s specification. Recommended products are: Hempel’s Galvosil 15700, Hempel’s Galvosil 15680, Hempel’s Galvosil Fibre 15750.
• Subsequent coat: None or according to Hempel’s specification. Recommended products are: Hempel’s Silicone Topcoat 56900, Hempel’s Silicone Acrylic 56940, Hempel’s Silicone Aluminium 56910.

Drying time

Surface temperature	Touch dry min	Hard dry hours
10°C [50°F]	90 min	4 h
20°C [68°F]	45 min	2 h
30°C [86°F]	30 min	1.5 h
40°C [104°F]	30 min	1.5 h

Overcoating

Quality name	10°C [50°F]	20°C [68°F]	30°C [86°F]	40°C [104°F]
Atmospheric severe Min / Max	18 h / Ext*	6 h / Ext*	3 h / Ext*	2.5 h / Ext*

Ext*: Depending on the actual exposure conditions, the coated surface is overcoatable for an extended period of time. Contact your local Hempel representative for advice.

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Drying conditions

– To obtain the drying time stated, it is important to maintain sufficient ventilation during application, drying and curing.

Overcoating details

– When overcoating Versiline CUI 56990 with itself, applying the product in multiple thin passes can reduce the risk of popping/pinholes.
– The surface must be dry and clean prior to application

STORAGE

Shelf life

Ambient temperature	Product
25°C [77°F]	12 months

Shelf life from date of production, when stored in original unopened containers. Thereafter, the product quality must be re-inspected. Storage at elevated temperatures may reduce shelf life. For advice, please consult Hempel.

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CARBON FOOTPRINT

Dry film thickness	GWP (Global Warming Potential)
1 µm	6.5 g CO₂e/m²
1 mil	0.034 lb CO₂e/ft²

The carbon footprint is for 1 square meter / square foot of surface area with a dry film thickness of 1 micron / mil. The scope includes raw materials, in-bound transport to the Hempel factory, Hempel manufacturing processes, and any Volatile Organic Compounds emitted during and after the application of the product. It is calculated based on the standard shade defined in this PDS. Values may vary with shade.

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REFERENCES

Product Data Sheet – Versiline CUI 56990
Issued by Hempel A/S – June 2025
Document Version: 4/4
Source: https://www.hempel.com

Technical Guidelines and Explanatory Notes
Last accessed: 28 May 2025
Reference link: https://www.hempel.com/service-and-support/technical-guidelines

Note: Always consult the latest version of the Product Data Sheet and associated documents directly from Hempel’s official website to ensure accuracy and compliance with the most current recommendations.