Silicone Acrylic

PRODUCT DATASHEET

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PRODUCT SAFETY

Flash point

25°C [77°F]

VOC content

Legislation	Value
EU	405 g/L [3.38 lb/US gal]
US (coatings)	404 g/L [3.37 lb/US gal]
US (regulatory)	405 g/L [3.38 lb/US gal]
China	405 g/L [3.38 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.

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: 56940
• Standard shade / code: Light grey 11150 *
• Gloss: Semi-flat
• Volume solids: 54 ± 2%
• Specific gravity: 1.4 kg/L [11 lb/US gal]
• Reference dry film thickness: 25 micron [1.0 mils]
• Aluminium shade / code: Aluminium grey 19000 **
• Gloss: Please consult Hempel’s Guideline on aluminium pigmented coatings.
• Volume solids: 29 ± 2%
• Specific gravity: 1.1 kg/L [9 lb/US gal]
• Reference dry film thickness: 25 micron [1.0 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.

Maintenance and Repair

• Spot abrasive blasting to min. PSa 2½ (ISO 8501-2) / SP 10 (SSPC).
• Remove dust, blast media and loose materials.

Consult Hempel’s separate Surface Preparation Guidelines for more details.

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APPLICATION

Mixing ratio

Stir well before use.

Thinner

Hempel’s Thinner 08080

Cleaner

Hempel’s Thinner 08080

Application method

Tool	Thinning max vol.	Application parameters
Airless spray	15%	Nozzle pressure: 125 bar [1800 psi], Nozzle orifice: 0.017″
Air spray	25%	Not Applicable
Brush	15%	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	25 micron [1.0 mils]	50 micron [2.0 mils]	25 micron [1.0 mils]
Wet film thickness	46 micron [1.9 mils]	93 micron [3.7 mils]	46 micron [1.9 mils]
Theoretical spreading rate	22 m²/L [896 sq ft/US gal]	11 m²/L [448 sq ft/US gal]	22 m²/L [896 sq ft/US gal]

Product may be specified in another film thickness than indicated depending on purpose and area of use. This will alter spreading rate, drying and curing time and overcoating interval. For best performance, avoid excessive film thickness.

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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 40°C [104°F].
• For application and curing at other conditions, please contact your local Hempel representative.

APPLICATION REMARKS

• Two coats of the topcoat may be necessary to obtain full hiding power.

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DRYING AND OVERCOATING

Product compatibility

• Previous coat: According to Hempel’s Specification. Recommended products are: Hempel’s Silicone Zinc 16900, Hempel’s Galvosil 15700, Hempel’s Silicone Aluminium 56914
• Subsequent coat: None.

Drying time

Surface temperature	Touch dry min	Hard dry min
20°C [68°F]	15 min	30 min

Determined for dry film thickness 25 micron [1.0 mils] at standard conditions, see Hempel’s Explanatory Notes for details.

Drying conditions

• To obtain the drying time stated, it is important to maintain sufficient ventilation during application, drying and curing.
• Condensation on the freshly applied coating should be avoided.

Overcoating details

• The surface must be dry and clean prior to application.

Other remarks

• Hempel’s Specification supersedes any recommendations given in the Product Data Sheets.

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STORAGE

Shelf life

Ambient temperature	Product
25°C [77°F]	24 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	11.2 g CO₂e/m²
1 mil	0.058 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 – Hempel’s Silicone Acrylic 56940
Issued by Hempel A/S – May 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.